Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2016	Oct. 21, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Trading Symbol	MAR
Entity Registrant Name	MARRIOTT INTERNATIONAL INC /MD/
Entity Central Index Key	0001048286
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		390,479,820

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
REVENUES
Base management fees	$ 180	$ 170	$ 538	$ 526
Franchise fees	250	227	692	652
Incentive management fees	81	68	276	238
Owned, leased, and other revenue	279	229	771	729
Cost reimbursements	3,152	2,884	9,339	8,635
Revenues	3,942	3,578	11,616	10,780
OPERATING COSTS AND EXPENSES
Owned, leased, and other - direct	194	175	533	552
Reimbursed costs	3,152	2,884	9,339	8,635
Depreciation, amortization, and other	36	31	97	107
General, administrative, and other	161	149	470	446
Merger-related costs and charges	228	0	250	0
Costs and Expenses, Total	3,771	3,239	10,689	9,740
OPERATING INCOME	171	339	927	1,040
Gains and other income, net	3	0	3	20
Interest expense	(55)	(43)	(159)	(121)
Interest income	9	5	22	19
Equity in earnings	3	8	8	13
INCOME BEFORE INCOME TAXES	131	309	801	971
Provision for income taxes	(61)	(99)	(265)	(314)
NET INCOME	$ 70	$ 210	$ 536	$ 657
EARNINGS PER SHARE
Earnings per share - basic (in USD per share)	$ 0.26	$ 0.80	$ 2.08	$ 2.43
Earnings per share - diluted (in USD per share)	0.26	0.78	2.04	2.38
CASH DIVIDENDS DECLARED PER SHARE (in USD per share)	$ 0.30	$ 0.25	$ 0.85	$ 0.70

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 70	$ 210	$ 536	$ 657
Other comprehensive income (loss):
Foreign currency translation adjustments	2	(28)	27	(47)
Derivative instrument adjustments, net of tax	1	2	(3)	9
Unrealized loss on available-for-sale securities, net of tax	0	(3)	0	(5)
Reclassification of losses (gains), net of tax	1	(3)	3	(7)
Total other comprehensive income (loss), net of tax	4	(32)	27	(50)
Comprehensive income	$ 74	$ 178	$ 563	$ 607

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and equivalents	$ 1,078	$ 96
Accounts and notes receivable, net	1,705	1,103
Prepaid expenses	168	77
Other	65	30
Assets held for sale	771	78
Assets, current, total	3,787	1,384
Property and equipment, net	2,411	1,029
Intangible assets
Brands	6,606	197
Contract acquisition costs and other	3,442	1,254
Goodwill	7,175	943
Goodwill and intangible assets, net, total	17,223	2,394
Equity and cost method investments	830	165
Notes receivable, net	240	215
Deferred tax assets	92	672
Other noncurrent assets	419	223
Total assets	25,002	6,082
Current liabilities
Current portion of long-term debt	316	300
Accounts payable	667	593
Accrued payroll and benefits	1,136	861
Liability for guest loyalty programs	1,860	952
Accrued expenses and other	1,250	527
Liabilities, current, total	5,229	3,233
Long-term debt	8,506	3,807
Liability for guest loyalty programs	2,538	1,622
Deferred tax liabilities	1,308	17
Other noncurrent liabilities	1,580	993
Shareholders’ equity (deficit)
Class A Common Stock	5	5
Additional paid-in-capital	5,740	2,821
Retained earnings	6,375	4,878
Treasury stock, at cost	(6,110)	(11,098)
Accumulated other comprehensive loss	(169)	(196)
Stockholders' equity (deficit) attributable to parent	5,841	(3,590)
Liabilities and equity (deficit), total	$ 25,002	$ 6,082

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES
Net income	$ 536	$ 657
Adjustments to reconcile to cash provided by operating activities:
Depreciation, amortization, and other	97	107
Share-based compensation	117	84
Income taxes	1	120
Liability for guest loyalty programs	179	119
Merger-related charges	172	0
Working capital changes	(47)	(77)
Other	77	70
Net cash provided by operating activities	1,132	1,080
INVESTING ACTIVITIES
Acquisition of a business, net of cash acquired	(2,412)	(137)
Capital expenditures	(132)	(218)
Dispositions	53	612
Loan advances	(24)	(12)
Loan collections	61	21
Contract acquisition costs	(55)	(89)
Redemption of debt security	0	121
Other	22	75
Net cash (used in) provided by investing activities	(2,487)	373
FINANCING ACTIVITIES
Commercial paper/Credit Facility, net	1,657	(274)
Issuance of long-term debt	1,483	790
Repayment of long-term debt	(296)	(7)
Issuance of Class A Common Stock	22	39
Dividends paid	(257)	(189)
Purchase of treasury stock	(248)	(1,821)
Other	(24)	0
Net cash provided by (used in) financing activities	2,337	(1,462)
INCREASE (DECREASE) IN CASH AND EQUIVALENTS	982	(9)
CASH AND EQUIVALENTS, beginning of period	96	104
CASH AND EQUIVALENTS, end of period	$ 1,078	$ 95

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The condensed consolidated financial statements present the results of operations, financial position, and cash flows of Marriott International, Inc. (“Marriott,” and together with its consolidated subsidiaries, “we,” “us,” or “the Company”). We also refer throughout to (i) our Condensed Consolidated Financial Statements as our “Financial Statements,” (ii) our Condensed Consolidated Statements of Income as our “Income Statements,” (iii) our Condensed Consolidated Balance Sheets as our “Balance Sheets,” (iv) our properties, brands, or markets in the United States (“U.S.”) and Canada as “North America” or “North American,” and (v) our properties, brands, or markets outside of the U.S. and Canada as “International.” References throughout to numbered “Footnotes” refer to the numbered Notes in these Notes to Condensed Consolidated Financial Statements, unless otherwise noted. These Financial Statements have not been audited. We have condensed or omitted certain information and footnote disclosures normally included in financial statements presented in accordance with U.S. generally accepted accounting principles (“GAAP”). The financial statements in this report should be read in conjunction with the consolidated financial statements and notes thereto in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 (“2015 Form 10-K”). Certain terms not otherwise defined in this Form 10-Q have the meanings specified in our 2015 Form 10-K. Preparation of financial statements that conform with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements, the reported amounts of revenues and expenses during the reporting periods, and the disclosures of contingent liabilities. Accordingly, ultimate results could differ from those estimates. The accompanying Financial Statements reflect all normal and recurring adjustments necessary to present fairly our financial position as of September 30, 2016 and December 31, 2015, the results of our operations for the three and nine months ended September 30, 2016 and September 30, 2015, and cash flows for the nine months ended September 30, 2016 and September 30, 2015. Interim results may not be indicative of fiscal year performance because of seasonal and short-term variations. We have eliminated all material intercompany transactions and balances between entities consolidated in these Financial Statements. We have made certain reclassifications of our prior year amounts to conform to our current presentation of “Brands” and “Deferred tax liabilities” in our Balance Sheets and “Merger-related costs and charges” in our Income Statements. Acquisition of Starwood Hotels & Resorts Worldwide On September 23, 2016, we completed the acquisition of Starwood Hotels & Resorts Worldwide, LLC, formerly known as Starwood Hotels & Resorts Worldwide, Inc. (“Starwood”) through a series of transactions, after which Starwood became an indirect wholly-owned subsidiary of the Company (the “Starwood Combination”). The Financial Statements in this report include Starwood’s results of operations for the eight days ended September 30, 2016 and reflect the financial position of our combined company at September 30, 2016. We refer to our business associated with brands that existed prior to the Starwood Combination as “Legacy-Marriott” and to Starwood’s business and brands that we acquired as “Legacy-Starwood.” See Footnote No. 2, “Acquisitions and Dispositions” for more information on the Starwood Combination. New Accounting Standards Accounting Standards Update No. 2014-09 - “Revenue from Contracts with Customers” (“ASU No. 2014-09”) ASU No. 2014-09 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, as well as most industry-specific guidance, and significantly enhances comparability of revenue recognition practices across entities and industries by providing a principles-based, comprehensive framework for addressing revenue recognition issues. In order for a provider of promised goods or services to recognize as revenue the consideration that it expects to receive in exchange for the promised goods or services, the provider should apply the following five steps: (1) identify the contract with a customer(s); (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU No. 2014-09 also specifies the accounting for some costs to obtain or fulfill a contract with a customer and provides enhanced disclosure requirements. The Financial Accounting Standards Board (“FASB”) has deferred ASU No. 2014-09 for one year, and with that deferral, the standard will be effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, which for us will be our 2018 first quarter. We are permitted to use either the retrospective or the modified retrospective method when adopting ASU No. 2014-09. We are still assessing the potential impact that ASU No. 2014-09 will have on our financial statements and disclosures, but we believe that there could be changes to the revenue recognition of real estate sales, franchise fees, and incentive management fees. Accounting Standards Update No. 2016-02 - “Leases” (“ASU No. 2016-02”) In February 2016, the FASB issued ASU No. 2016-02, which introduces a lessee model that brings substantially all leases onto the balance sheet. Under the new standard, a lessee will recognize on its balance sheet a lease liability and a right-of-use asset for all leases, including operating leases, with a term greater than 12 months. The new standard will also distinguish leases as either finance leases or operating leases. This distinction will affect how leases are measured and presented in the income statement and statement of cash flows. ASU No. 2016-02 is effective for annual and interim periods in fiscal years beginning after December 15, 2018. We are still assessing the potential impact that ASU No. 2016-02 will have on our financial statements and disclosures. Accounting Standards Update No. 2016-09 - “Stock Compensation” (“ASU No. 2016-09”) In March 2016, the FASB issued ASU No. 2016-09, which involves several aspects of the accounting for share-based payments. The new guidance will require excess tax benefits to be recorded as income tax expense (or benefit) in the income statement. Currently, excess tax benefits are recorded in additional paid-in-capital in the balance sheet. In the statement of cash flows, the new guidance requires both excess tax benefits and employee tax withholdings to be presented as operating inflows rather than as financing inflows. ASU No. 2016-09 is effective for annual and interim periods beginning after December 15, 2016. We are still assessing the potential impact that ASU No. 2016-09 will have on our financial statements and disclosures, but we believe that, during periods when our stock price increases, it will generally result in (1) a decrease to our income tax expense and effective tax rate and (2) an increase to our cash flows from operating activities.

Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Acquisitions and Dispositions

ACQUISITIONS AND DISPOSITIONS

Acquisition

On September 23, 2016 (the “Merger Date”), we completed the Starwood Combination. Starwood is a leading hospitality company. The combination of our brands creates a more comprehensive portfolio, enhances our global market distribution, and provides opportunities for cost efficiencies. Our combined company now operates or franchises nearly 6,000 properties with over 1.1 million rooms, representing 30 leading brands from the moderate-tier to luxury in 120 countries and territories.

Shareholders of Starwood received 0.80 shares of our Class A Common Stock and $21.00 in cash for each share of Starwood common stock. The following table presents the fair value of each class of consideration transferred.



(in millions, except per share amounts)
Equivalent shares of Marriott common stock issued in exchange for Starwood outstanding shares	134.4
Marriott common stock price as of Merger Date	$	68.44
Fair value of Marriott common stock issued in exchange for Starwood outstanding shares	9,198
Cash consideration to Starwood shareholders, net of cash acquired of $1,116	2,412
Fair value of Marriott equity-based awards issued in exchange for vested Starwood equity-based awards	88
Total consideration transferred, net of cash acquired	$	11,698

Preliminary Fair Values of Assets Acquired and Liabilities Assumed

The following table presents our preliminary estimates of fair values of the assets that we acquired and the liabilities that we assumed. Our preliminary estimates are based on the information that was available as of the Merger Date, and we are continuing to evaluate the underlying inputs and assumptions used in our valuations. Accordingly, these preliminary estimates are subject to change during the measurement period, which is up to one year from the Merger Date.



($ in millions)
Working capital	$	(115	)
Property and equipment	2,045
Identified intangible assets	8,573
Equity and cost method investments	648
Other noncurrent assets	207
Deferred income taxes, net	(1,845		)
Guest loyalty program	(1,647		)
Debt	(1,876		)
Other noncurrent liabilities	(518		)
Net assets acquired	5,472
Goodwill ⁽¹⁾	6,226
	$	11,698


(1)	Goodwill is calculated as total consideration transferred, net of cash acquired, less identified net assets acquired, and it primarily represents the value that we expect to obtain from synergies and growth opportunities from our combined operations. We have not completed the assignment of goodwill to our reporting units as of the date of this report, and it is not deductible for tax purposes.

Property and Equipment

We acquired property and equipment, which primarily consists of 15 owned hotels. We provisionally estimated the value of the properties using a combination of the income, cost, and market approaches, which are primarily based on significant Level 2 and Level 3 assumptions, such as estimates of future income growth, capitalization rates, discount rates, and capital expenditure needs of the hotels. We are continuing to assess the marketplace assumptions and property conditions, which could result in changes to these provisional values.

Identified Intangible Assets

The following table presents our preliminary estimates of the fair values of Starwood’s identified intangible assets and their related estimated useful lives.



	Estimated Fair Value (in millions)		Estimated Useful Life (in years)
Brands	$	6,400	indefinite
Management and Operating Lease Agreements	1,394		20-30
Franchise Agreements	729		20-80
Loyalty Program Marketing Rights	50		25-30
	$	8,573

We provisionally estimated the value of Starwood’s brands using the relief-from-royalty method, which applies an estimated royalty rate to forecasted future cash flows, discounted to present value. We estimated the value of management, franchise, and lease agreements using the multi-period excess earnings method, which is a variation of the income approach. This method estimates an intangible asset’s value based on the present value of the incremental after-tax cash flows attributable to the intangible asset. These valuation approaches utilize Level 3 inputs, and we continue to review Starwood’s contracts and historical performance in addition to evaluating the inputs, including the discount rates and growth assumptions, which could result in changes to these provisional values.

Franchise agreements include an exclusive, 80-year global license agreement with Vistana Signature Experiences, Inc. (“Vistana”), Starwood’s former vacation ownership business that is now part of Interval Leisure Group, Inc. (“ILG”), for the use of the Westin and Sheraton brands in vacation ownership. In addition, ILG has the non-exclusive license for the existing St. Regis and The Luxury Collection vacation ownership properties. Under this agreement, we will receive a fixed annual license fee, adjusted for inflation, of $30 million plus certain variable fees based on sales volumes.

Investments

Our provisional estimate of the fair value of the equity method investments that we acquired was $647 million. This value exceeded our share of the book value of the investees' net assets by $501 million, primarily due to the value that we assigned to land and buildings owned by the investees. We provisionally estimated the value of the investees’ real estate using the same methods as for property and equipment described above. Excluding the amount attributable to land, we amortize the difference on a straight-line basis over the underlying assets' estimated useful lives when calculating equity method earnings attributable to us. We are continuing to review the terms of the partnership and joint venture agreements, assess the conditions of the properties, and evaluate the discount rates, any discounts for lack of marketability and control as appropriate, and growth assumptions used in valuing these investments, which could result in changes to our provisional values.

Deferred Income Taxes

Deferred income taxes primarily relate to the fair value of noncurrent assets and liabilities acquired from Starwood, including property and equipment, intangible assets, equity and cost method investments, and long-term debt. We provisionally estimated deferred income taxes based on statutory rates in the jurisdictions of the legal entities where the acquired noncurrent assets and liabilities are recorded. We are continuing to assess the tax rates used, and we will update our estimate of deferred income taxes based on changes to our provisional valuations of the related assets and liabilities and refinement of the effective tax rates, which could result in changes to these provisional values.

Guest Loyalty Program

The Starwood Preferred Guest (SPG) program is Starwood’s frequent traveler, customer loyalty, and multi-brand marketing program. Members can earn and redeem points for room stays, room upgrades, and airline flights. As of the Merger Date, we assumed the fair value of this liability equals Starwood’s historical book value in establishing a provisional estimate for this liability. We are in the process of obtaining an actuarial valuation of the future redemption obligations, which could result in changes to these provisional values.

Debt and Lease Obligations

We primarily valued debt using quoted market prices, which are considered Level 1 inputs as they are observable in the market. For more information on Starwood debt, see Footnote No. 8 “Long-Term Debt.”

The following table presents the future minimum lease obligations that we assumed and for which we are the primary obligor as of September 30, 2016:



($ in millions)	Operating Leases		Capital Leases
2016, remaining	$	16	$	3
2017	64		11
2018	61		12
2019	57		12
2020	55		12
Thereafter	630		203
Total minimum lease payments	$	883	$	253
Less: amount representing interest			(86		)
Present value of minimum lease payments			$	167

Most leases have initial terms of up to 20 years, contain one or more renewals at our option, generally for five- or 10-year periods, and generally contain fixed and variable components. The variable components of leases of land or building facilities are primarily based on operating performance of the leased property.

Pro Forma Results of Operations

The following unaudited pro forma information presents the combined results of operations of Marriott and Starwood as if we had completed the Starwood Combination on January 1, 2015, but using our preliminary fair values of assets and liabilities as of the Merger Date. As required by GAAP, these unaudited pro forma results do not reflect any cost saving synergies from operating efficiencies. Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of what the actual results of operations of the combined company would have been if the Starwood Combination had occurred at the beginning of the period presented, nor are they indicative of future results of operations.



	Nine Months Ended
($ in millions)	September 30, 2016		September 30, 2015
Revenues	$	15,038	$	14,373
Net income	$	853	$	675

The unaudited pro forma results include $54 million of integration costs for the nine months ended September 30, 2016 and $320 million of transaction and employee termination costs for the nine months ended September 30, 2015.

Starwood Results of Operations

The following table presents the results of Starwood operations included in our Income Statements for the eight days from the Merger Date through the end of the 2016 third quarter.



($ in millions)	September 23, 2016 - September 30, 2016
Revenue	$	168
Net loss	$	(131	)

Dispositions and Planned Dispositions

At the end of the 2016 third quarter, we held $741 million of assets classified as “Assets held for sale” and $37 million of liabilities recorded under “Accrued expenses and other” on our Balance Sheets, both related to hotels that we acquired through the Starwood Combination.

In addition, at the end of the 2016 third quarter, we held $30 million of assets related to the remaining Miami Beach EDITION residences classified as “Assets held for sale” and $3 million of liabilities associated with those assets, which we recorded under “Accrued expenses and other” on our Balance Sheets.

In the 2016 second quarter, we sold a North American Limited-Service segment plot of land and received $46 million in cash.

Merger-Related Costs and Charges Merger-Related Costs and Charges

9 Months Ended

Sep. 30, 2016

Restructuring and Related Activities [Abstract]

Merger-Related Costs and Charges

MERGER-RELATED COSTS AND CHARGES

The following table presents pre-tax merger-related costs and other charges that we incurred in connection with the Starwood Combination.



	Three Months Ended				Nine Months Ended
($ in millions)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
Merger-related costs and charges
Transaction costs	$	18	$	—	$	31	$	—
Employee termination costs	186		—		186		—
Integration costs	24		—		33		—
	228		—		250		—
Interest expense	9		—		22		—
	$	237	$	—	$	272	$	—

Transaction costs represent costs related to the planning and execution of the Starwood Combination, primarily for financial advisory, legal, and other professional service fees. Employee termination costs represent employee severance, retention, and other termination benefits. Integration costs primarily represent integration employee salaries and share-based compensation, change management and legal consultants, and technology-related costs. Merger-related interest expense reflects costs that we incurred for a bridge term loan facility commitment and incremental interest expense for debt incurred prior to the Merger Date related to the Starwood Combination.

We reflect our liability at September 30, 2016 for severance and other employee termination charges in our Balance Sheets as $242 million of “Accrued expenses and other.”

Earnings Per Share

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

The table below presents the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share:



	Three Months Ended				Nine Months Ended
(in millions, except per share amounts)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
Computation of Basic Earnings Per Share
Net income	$	70	$	210	$	536	$	657
Shares for basic earnings per share	266.2		262.2		258.3		270.7
Basic earnings per share	$	0.26	$	0.80	$	2.08	$	2.43
Computation of Diluted Earnings Per Share
Net income	$	70	$	210	$	536	$	657
Shares for basic earnings per share	266.2		262.2		258.3		270.7
Effect of dilutive securities
Employee stock option and appreciation right plans	1.7		2.2		1.8		2.3
Deferred stock incentive plans	0.5		0.6		0.5		0.6
Restricted stock units and restricted stock	2.1		2.3		2.1		2.5
Shares for diluted earnings per share	270.5		267.3		262.7		276.1
Diluted earnings per share	$	0.26	$	0.78	$	2.04	$	2.38

We compute the effect of dilutive securities using the treasury stock method and average market prices during the period. We excluded antidilutive stock options and stock appreciation rights of 0.3 million for both the 2016 third quarter and the 2015 third quarter, 0.3 million for the 2016 first three quarters, and 0.2 million for the 2015 first three quarters from our calculation of diluted earnings per share because their exercise prices were greater than the average market prices.

Share-Based Compensation

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

SHARE-BASED COMPENSATION

Legacy-Marriott Plans

Under our Stock and Cash Incentive Plan (the “Stock Plan”), we award: (1) stock options (our “Stock Option Program”) to purchase our Class A Common Stock (“common stock”); (2) stock appreciation rights (“SARs”) for our common stock (our “SAR Program”); (3) restricted stock units (“RSUs”) of our common stock; and (4) deferred stock units. We also issue performance-based RSUs (“PSUs”) to named executive officers and some of their direct reports under the Stock Plan. We grant awards at exercise prices or strike prices that equal the market price of our common stock on the date of grant.

We recorded share-based compensation expense for award grants of $39 million for the 2016 third quarter and $29 million for the 2015 third quarter, $98 million for the 2016 first three quarters, and $84 million for the 2015 first three quarters. Deferred compensation costs for unvested awards totaled $177 million at September 30, 2016 and $116 million at December 31, 2015.

RSUs and PSUs

We granted 1.6 million RSUs during the 2016 first three quarters to certain officers, key employees, and non-employee directors, and those units vest generally over four years in equal annual installments commencing one year after the grant date. We granted 0.2 million PSUs during the 2016 first three quarters to certain executive officers, subject to continued employment and the satisfaction of certain performance conditions based on achievement of pre-established targets for Adjusted EBITDA, RevPAR Index, room openings, and/or net administrative expense over, or at the end of, a three-year vesting period. We also granted 0.6 million PSUs during the 2016 first three quarters to certain senior leaders and members of the Company’s integration team that, subject to continued employment, vest based upon achievement of pre-established targets related to the Starwood Combination over, or at the end of, a three-year performance period. RSUs, including PSUs, granted in the 2016 first three quarters had a weighted average grant-date fair value of $63.

SARs

We granted 0.4 million SARs to officers and key employees during the 2016 first three quarters. These SARs generally expire ten years after the grant date and both vest and may be exercised in cumulative installments of one quarter at the end of each of the first four years following the grant date. The weighted average grant-date fair value of SARs granted in the 2016 first three quarters was $22 and the weighted average exercise price was $67.

We used the following assumptions as part of a binomial lattice-based valuation to determine the fair value of the SARs we granted during the 2016 first three quarters:



Expected volatility	30.4%
Dividend yield	1.3%
Risk-free rate	1.7 - 1.8%
Expected term (in years)	8 - 10

In making these assumptions, we base expected volatility on the historical movement of the Company’s stock price. We base risk-free rates on the corresponding U.S. Treasury spot rates for the expected duration at the date of grant, which we convert to a continuously compounded rate. The dividend yield assumption takes into consideration both historical levels and expectations of future dividend payout. The weighted average expected terms for SARs are an output of our valuation model which utilizes historical data in estimating the period of time that the SARs are expected to remain unexercised. We calculate the expected terms for SARs for separate groups of retirement eligible, non-retirement eligible employees, and non-employee directors. Our valuation model also uses historical data to estimate exercise behaviors, which include determining the likelihood that employees will exercise their SARs before expiration at a certain multiple of stock price to exercise price.

Legacy-Starwood Plans

In the Starwood Combination we assumed Starwood’s 2013 Long-Term Incentive Compensation Plan (“Starwood LTIP”) and equity awards outstanding under the Starwood LTIP and other Starwood equity plans. On the Merger Date, outstanding Starwood equity awards were converted to equity awards with respect to Marriott’s common stock, resulting in 1.1 million RSUs (“Starwood RSUs”), 1.6 million shares of Restricted Stock (“Starwood Restricted Stock”), and 0.2 million options. The awards generally vest over three years in equal annual installments, subject to a prorated adjustment for employees who are terminated under certain circumstances or who retire. The Starwood RSUs and Starwood Restricted Stock had a weighted average fair value of $68 on the Merger Date.

We recorded share-based compensation expense on these awards of $19 million for the eight days ended September 30, 2016. Deferred compensation costs for unvested awards totaled $87 million as of September 30, 2016.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Our effective tax rate increased to 46.4% for the 2016 third quarter from 32.4% for the 2015 third quarter, and to 33.1% for the 2016 first three quarters from 32.4% for the 2015 first three quarters, primarily due to lower benefits from Starwood merger-related costs that were incurred in foreign jurisdictions with lower tax rates, and the portion of merger-related costs that were incurred in the U.S. that are not deductible for U.S. income tax purposes. The year-to-date increase is also due to a $5 million reserve established due to a recent examination of a tax position taken in a foreign jurisdiction, partially offset by a $15 million release of a valuation allowance related to a capital loss. For the 2016 third quarter, our unrecognized tax benefits balance of $398 million increased by $374 million from year-end 2015, primarily reflecting $365 million of Legacy-Starwood unrecognized tax benefits recorded in connection with the Starwood Combination. The unrecognized tax benefits balance included $269 million of tax positions that, if recognized, would impact our effective tax rate. It is reasonably possible that $38 million of unrecognized tax benefits as of September 30, 2016 will be reversed within the next twelve months. We are continuing to analyze whether or not we have properly identified all liabilities associated with tax uncertainties in jurisdictions where Starwood operates, which could result in changes to our provisional values related to our uncertain tax positions. We file income tax returns, including returns for our subsidiaries, in various jurisdictions around the world. The U.S. Internal Revenue Service (“IRS”) has examined our federal income tax returns, and has settled all issues for tax years through 2013 for Marriott and through 2006 for Starwood. Our Marriott 2014 and 2015 tax year audits are substantially complete, and our Marriott 2016 tax year audit is currently ongoing. Starwood is currently under audit by the IRS for years 2010 through 2012 and in appeals for years 2007 through 2009. Various foreign, state, and local income tax returns are also under examination by the applicable taxing authorities. We paid cash for income taxes, net of refunds, of $243 million in the 2016 first three quarters and $161 million in the 2015 first three quarters.

Commitments and Contingencies

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Guarantees

We issue guarantees to certain lenders and hotel owners, chiefly to obtain long-term management contracts. The guarantees generally have a stated maximum funding amount and a term of three to ten years. The terms of guarantees to lenders generally require us to fund if cash flows from hotel operations are inadequate to cover annual debt service or to repay the loan at maturity. The terms of the guarantees to hotel owners generally require us to fund if the hotels do not attain specified levels of operating profit. Guarantee fundings to lenders and hotel owners are generally recoverable out of future hotel cash flows and/or proceeds from the sale of hotels. We also enter into project completion guarantees with certain lenders in conjunction with hotels that we or our joint venture partners are building.

We present the maximum potential amount of our future guarantee fundings and the carrying amount of our liability for guarantees for which we are the primary obligor at September 30, 2016 in the following table:



($ in millions) Guarantee Type	Maximum Potential Amount of Future Fundings		Recorded Liability for Guarantees
Debt service	$	122	$	22
Operating profit	121		37
Other	8		1
Total guarantees where we are the primary obligor	$	251	$	60

Our liability at September 30, 2016, for guarantees for which we are the primary obligor is reflected in our Balance Sheets as $60 million of “Other noncurrent liabilities.”

Our guarantees listed in the preceding table include $14 million of debt service guarantees and $51 million of operating profit guarantees that will not be in effect until the underlying properties open and we begin to operate the properties or certain other events occur.

The table above does not include a “contingent purchase obligation,” which is not currently in effect, that we entered into in the 2014 first quarter to provide credit support to lenders for a construction loan. We entered into that agreement in conjunction with signing a management agreement for The Times Square EDITION hotel in New York City (currently projected to open in 2017), and the hotel’s ownership group obtaining acquisition financing and entering into agreements concerning future construction financing for the mixed use project (which includes both the hotel and adjacent retail space). Under the agreement, we granted the lenders the right, upon an uncured event of default by the hotel owner under, and an acceleration of, the mortgage loan, to require us to purchase the hotel component of the property for $315 million during the first two years after opening (the “put option”). Because we would acquire the building upon exercise of the put option, we have not included the amount in the table above. The lenders may extend the period during which the put option is exercisable for up to three years to complete foreclosure if the loan has been accelerated and certain other conditions are met. We do not currently expect that the lenders will require us to purchase the hotel component. We have no ownership interest in this hotel.

The preceding table also does not include the following guarantees:

•

$48 million of guarantees for Senior Living Services, consisting of lease obligations of $35 million (expiring in 2019) and lifecare bonds of $13 million (estimated to expire in 2019), for which we are secondarily liable. Sunrise Senior Living, Inc. (“Sunrise”) is the primary obligor on both the leases and $2 million of the lifecare bonds; HCP, Inc., as successor by merger to CNL Retirement Properties, Inc. (“CNL”), is the primary obligor on the remaining $11 million of the lifecare bonds. Before we sold the Senior Living Services business in 2003, these were our guarantees of obligations of our then consolidated Senior Living Services subsidiaries. Sunrise and CNL have indemnified us for any fundings we may be called upon to make under these guarantees. Our liability for these guarantees had a carrying value of $2 million at September 30, 2016. In conjunction with our consent of the 2011 extension of certain lease obligations until 2018, Sunrise provided us with $1 million of cash collateral and an $85 million letter of credit issued by Key Bank to secure our continued exposure under the lease guarantees during the extension term and certain other obligations of Sunrise. The letter of credit balance was $45 million at the end of the 2016 third quarter. During the extension term, Sunrise agreed to make an annual payment to us from the cash flow of the continuing lease facilities, subject to a $1 million annual minimum. In the 2013 first quarter, Sunrise merged with Health Care REIT, Inc. (“HCN”), and Sunrise’s management business was acquired by an entity formed by affiliates of Kohlberg Kravis Roberts & Co. LP, Beecken Petty O’Keefe & Co., Coastwood Senior Housing Partners LLC, and HCN. In April of 2014, HCN and Revera Inc., a private provider of senior living services, acquired Sunrise’s management business.

•

Lease obligations, for which we became secondarily liable when we acquired the Renaissance Hotel Group N.V. in 1997, consisting of annual rent payments of approximately $4 million and total remaining rent payments through the initial term of approximately $16 million. The majority of these obligations expire by the end of 2020. CTF Holdings Ltd. (“CTF”) had originally provided €35 million in cash collateral in the event that we are required to fund under such guarantees, approximately $2 million (€2 million) of which remained at September 30, 2016. Our exposure for the remaining rent payments through the initial term will decline to the extent that CTF obtains releases from the landlords or these hotels exit our system. Since the time we assumed these guarantees, we have not funded any amounts, and we do not expect to fund any amounts under these guarantees in the future.

•

A guarantee relating to the timeshare business, which was outstanding at the time of the 2011 Timeshare spin-off and for which we became secondarily liable as part of the spin-off. The guarantee relates to a Marriott Vacations Worldwide Corporation (“MVW”) payment obligation, for which we had an exposure of $4 million (5 million Singapore Dollars) at September 30, 2016. MVW has indemnified us for this obligation, which we expect will expire in 2022. We have not funded any amounts under this obligation, and do not expect to do so in the future. Our liability for this obligation had a carrying value of $1 million at September 30, 2016.

•

A guarantee for a lease, originally entered into in 2000, for which we became secondarily liable in 2012 as a result of our sale of the ExecuStay corporate housing business to Oakwood Worldwide (“Oakwood”). Oakwood has indemnified us for the obligations under this guarantee. Our total exposure at the end of the 2016 third quarter for this guarantee was $6 million in future rent payments through the end of the lease in 2019.

In addition to the guarantees described in the preceding paragraphs, in conjunction with financing obtained for specific projects or properties owned by us or joint ventures in which we are a party, we may provide industry standard indemnifications to the lender for loss, liability, or damage occurring as a result of the actions of the other joint venture owner or our own actions.

Commitments

In addition to the guarantees we note in the preceding paragraphs, as of September 30, 2016, we had the following commitments outstanding, which are not recorded on our Balance Sheets:


•	Commitments to invest up to $9 million of equity for non-controlling interests in joint ventures. We expect to fund $2 million of these commitments over the next 12 months. We do not expect to fund the remaining $7 million of these commitments, most of which expire in 2019.

•

We have a right and under certain circumstances an obligation to acquire our joint venture partner’s remaining interests in two joint ventures over the next five years at a price based on the performance of the ventures. In conjunction with this contingent obligation, we advanced $20 million (€15 million) in deposits, $13 million (€11 million) of which are remaining. The amounts on deposit are refundable to the extent we do not acquire our joint venture partner’s remaining interests.


•	Various loan commitments totaling $58 million, of which we expect to fund $10 million in 2016, $28 million in 2017, and $20 million thereafter.

•

Various commitments to purchase information technology hardware, software, accounting, finance, and maintenance services in the normal course of business totaling $477 million. We expect to purchase goods and services subject to these commitments as follows: $58 million in 2016, $157 million in 2017, $115 million in 2018, and $147 million thereafter. The increase in purchase commitments compared to year-end 2015 is primarily due to the consolidation of $353 million of Starwood’s purchase commitments. We are evaluating the contractual nature of such commitments.


•	Several commitments aggregating $41 million, which we do not expect to fund.

Letters of Credit

At September 30, 2016, we had $158 million of letters of credit outstanding (all outside the Credit Facility, as defined in Footnote No. 8, “Long-Term Debt”), the majority of which were for our self-insurance programs. Surety bonds issued as of September 30, 2016, totaled $154 million, the majority of which state governments requested in connection with our self-insurance programs.

Legal Proceedings

The Korea Fair Trade Commission recently informed us that the previously disclosed investigation of pricing practices at several of our hotels in Seoul, Korea is now closed.

In November 2015, Starwood announced a malware intrusion had affected point of sale systems at various outlets within certain Legacy-Starwood branded hotels. This resulted in the potential compromise of credit card data and associated personal information. The affected credit card companies are evaluating whether and to what extent financial penalties should be imposed. In addition, a putative class action arising from the malware intrusion was filed against Starwood on January 5, 2016 in the United States District Court for the Southern District of California. The named plaintiff, Paul Dugas, does not specify any damages sought, and a motion to dismiss the case is awaiting resolution by the Court.

On May 10, 2016, the owners of the Sheraton Grand Chicago and the Westin Times Square, New York, filed suit in the Supreme Court of New York against Starwood and Marriott seeking to enjoin the merger of Starwood and Marriott based upon alleged violations of the territorial restrictions contained in the management agreements for those two hotels arising as a result of the merger of Marriott and Starwood. While the attempt to enjoin the merger ultimately failed, the underlying suit continues as a breach of contract claim, and plaintiffs seek, among other remedies, monetary damages relating to the alleged violations.

Long-Term Debt

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Long-Term Debt

LONG-TERM DEBT

We provide detail on our long-term debt balances, net of discounts, premiums, and debt issuance costs, in the following table as of the end of the 2016 third quarter and year-end 2015:



	At Period End
($ in millions)	September 30, 2016			December 31, 2015
Senior Notes:
Series H Notes, interest rate of 6.2%, face amount of $289, matured June 15, 2016 (effective interest rate of 6.3%)	$	—		$	289
Series I Notes, interest rate of 6.4%, face amount of $293, maturing June 15, 2017 (effective interest rate of 6.5%)	293			293
Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)	596			595
Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)	348			348
Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)	347			347
Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)	396			395
Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)	446			446
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)	344			343
Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)	742			—
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)	742			—
Commercial paper	1,599			938
Credit Facility	989			—
Other	105			113
Starwood debt:
2018 Senior Notes, interest rate of 6.8%, face amount $371, maturing May 15, 2018 (effective interest rate of 1.6%)	403			—
2019 Senior Notes, interest rate of 7.2%, face amount $210, maturing December 1, 2019 (effective interest rate of 2.2%)	245			—
2023 Senior Notes, interest rate of 3.1%, face amount $350, maturing February 15, 2023 (effective interest rate of 3.1%)	350			—
2025 Senior Notes, interest rate of 3.8%, face amount $350, maturing March 15, 2025 (effective interest rate of 2.8%)	375			—
2034 Senior Notes, interest rate of 4.5%, face amount $300, maturing October 1, 2034 (effective interest rate of 4.1%)	317			—
Capital lease obligations	167			—
Mortgages and other, interest rates ranging from non-interest bearing to 3.7%, various maturities	18			—
	8,822			4,107
Less: Current portion of long-term debt	(316		)	(300		)
	$	8,506		$	3,807

All of our long-term debt is recourse to us but unsecured. We paid cash for interest, net of amounts capitalized, of $99 million in the 2016 first three quarters and $71 million in the 2015 first three quarters.

Our long-term debt balance increased from year-end 2015 primarily due to the consolidation of Starwood’s long-term debt obligations in the 2016 third quarter and the issuance of debt to finance the cash portion of the Starwood Combination.

On the Merger Date, in accordance with the terms of the indentures governing the 2019 and 2023 Senior Notes, we initiated an offer to repurchase any or all Starwood 2019 and 2023 Senior Notes at a price of 101 percent of the aggregate principal amount, plus any accrued and unpaid interest. Upon expiration of the offer early in the 2016 fourth quarter, we extinguished less than $1 million aggregate principal amount of 2019 Senior Notes and $24 million aggregate principal amount of 2023 Senior Notes, resulting in total cash outflows of $24 million.

In the 2016 second quarter, we issued $1,500 million aggregate principal amount of 2.300 percent Series Q Notes due 2022 (the “Series Q Notes”) and 3.125 percent Series R Notes due 2026 (the “Series R Notes” and together with the Series Q Notes, the “Notes”). We received net proceeds of approximately $1,485 million from the offering of the Notes, after deducting the underwriting discount and estimated expenses. We used these proceeds, together with borrowings under our Credit Facility, as defined below, primarily to finance the cash component of the consideration paid to Starwood shareholders and certain fees and expenses we incurred in connection with the Starwood Combination.

We issued the Notes under an indenture dated as of November 16, 1998 with The Bank of New York Mellon, as successor to JPMorgan Chase Bank, N.A. (formerly known as The Chase Manhattan Bank), as trustee. We may redeem some or all of each series of the Notes prior to maturity under the terms provided in the applicable form of

Note.

In the 2016 second quarter, we amended and restated our multicurrency revolving credit agreement (the “Credit Facility”) to extend the maturity date of the Credit Facility and increase the aggregate amount of available borrowings to up to $4,000 million, up to $2,500 million of which was initially available, with the full $4,000 million becoming available to us with the closing of the Starwood Combination. The availability of the Credit Facility supports our commercial paper program and general corporate needs, including working capital, capital expenditures, share repurchases, letters of credit, and acquisitions. In addition, we used borrowings under the Credit Facility, a portion of which we later repaid with commercial paper supported by the Credit Facility, to finance part of the cash component of the consideration we paid to Starwood shareholders and certain fees and expenses we incurred in connection with the Starwood Combination. Borrowings under the Credit Facility generally bear interest at LIBOR (the London Interbank Offered Rate) plus a spread, based on our public debt rating. We also pay quarterly fees on the Credit Facility at a rate based on our public debt rating. While any outstanding commercial paper borrowings and/or borrowings under our Credit Facility generally have short-term maturities, we classify the outstanding borrowings as long-term based on our ability and intent to refinance the outstanding borrowings on a long-term basis. The Credit Facility expires on June 10, 2021. See the “Cash Requirements and Our Credit Facilities” caption later in this report in the “Liquidity and Capital Resources” section for information on our available borrowing capacity at September 30, 2016.

The following table presents future principal payments, net of discounts, premiums, and debt issuance costs, that are due for our debt as of the end of the 2016 third quarter:



Debt Principal Payments ($ in millions)	Amount
2016, remaining	$	17
2017	305
2018	416
2019	856
2020	363
Thereafter	6,865
Balance at September 30, 2016	$	8,822

Notes Receivable

9 Months Ended

Sep. 30, 2016

Receivables [Abstract]

Notes Receivable

NOTES RECEIVABLE

The following table presents the composition of our notes receivable balances (net of reserves and unamortized discounts) at the end of the 2016 third quarter and year-end 2015:



	At Period End
($ in millions)	September 30, 2016			December 31, 2015
Senior, mezzanine, and other loans	$	246		$	221
Less current portion	(6		)	(6		)
	$	240		$	215

We do not have any past due notes receivable amounts at the end of the 2016 third quarter. The unamortized discounts for our notes receivable were $23 million at the end of the 2016 third quarter and $31 million at year-end 2015.

The following table presents the expected future principal repayments (net of reserves and unamortized discounts) as well as interest rates for our notes receivable as of the end of the 2016 third quarter:



Notes Receivable Principal Repayments (net of reserves and unamortized discounts) and Interest Rates ($ in millions)	Amount
2016, remaining	$	4
2017	4
2018	74
2019	16
2020	17
Thereafter	131
Balance at September 30, 2016	$	246
Weighted average interest rate at September 30, 2016	6.8%
Range of stated interest rates at September 30, 2016	0 - 18%

At the end of the 2016 third quarter, our recorded investment in impaired senior, mezzanine, and other loans was $74 million, and we had $57 million allowance for credit losses, leaving $17 million of exposure to our investment in impaired loans. At year-end 2015, our recorded investment in impaired senior, mezzanine, and other loans was $72 million, and we had a $55 million allowance for credit losses, leaving $17 million of exposure to our investment in impaired loans. Our average investment in impaired notes receivable totaled $74 million for the 2016 third quarter, $73 million for the 2016 first three quarters, $71 million for the 2015 third quarter, and $67 million for the 2015 first three quarters.

Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

FAIR VALUE OF FINANCIAL INSTRUMENTS

We believe that the fair values of our current assets and current liabilities approximate their reported carrying amounts. We present the carrying values and the fair values of noncurrent financial assets and liabilities that qualify as financial instruments, determined under current guidance for disclosures on the fair value of financial instruments, in the following table:



	September 30, 2016						December 31, 2015
($ in millions)	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Senior, mezzanine, and other loans	$	240		$	226		$	215		$	209
Marketable securities	30			30			37			37
Total noncurrent financial assets	$	270		$	256		$	252		$	246

Senior notes	$	(5,650	)	$	(5,828	)	$	(2,766	)	$	(2,826	)
Commercial paper/ Credit Facility	(2,588		)	(2,588		)	(938		)	(938		)
Other long-term debt	(100		)	(111		)	(99		)	(108		)
Other noncurrent liabilities	(63		)	(63		)	(63		)	(63		)
Total noncurrent financial liabilities	$	(8,401	)	$	(8,590	)	$	(3,866	)	$	(3,935	)

We estimate the fair value of our senior, mezzanine, and other loans, including the current portion, by discounting cash flows using risk-adjusted rates and current market conditions, which are Level 3 inputs.

We carry our marketable securities at fair value. Our marketable securities include debt securities of the U.S. Government, its sponsored agencies and other U.S. corporations invested for our self-insurance programs, as well as shares of publicly traded companies, which we value using directly observable Level 1 inputs. The carrying value of these marketable securities was $30 million at the end of the 2016 third quarter.

We estimate the fair value of our other long-term debt, including the current portion and excluding leases, using expected future payments discounted at risk-adjusted rates, which are Level 3 inputs. We determine the fair value of our senior notes using quoted market prices, which are directly observable Level 1 inputs. As noted in Footnote No. 8, “Long-Term Debt,” even though our commercial paper borrowings and Credit Facility borrowings generally have short-term maturities of 30 days or less, we classify outstanding commercial paper borrowings and Credit Facility borrowings as long-term based on our ability and intent to refinance them on a long-term basis. As we are a frequent issuer of commercial paper, we use pricing from recent transactions as Level 2 inputs in estimating fair value. At year-end 2015, we determined that the carrying value of our commercial paper and Credit Facility borrowings approximated fair value due to the short maturity. Our other long-term liabilities largely consist of guarantees. We measure our liability for guarantees at fair value on a nonrecurring basis, which is when we issue or modify a guarantee using Level 3 internally developed inputs. At the end of the 2016 third quarter and year-end 2015, we determined that the carrying values of our guarantee liabilities approximated their fair values based on Level 3 inputs.

See the “Fair Value Measurements” caption of Footnote No. 2, “Summary of Significant Accounting Policies” of our 2015 Form 10-K for more information on the input levels we use in determining fair value.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Other Comprehensive Income (Loss) and Shareholders' Equity (Deficit)

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Other Comprehensive Income (Loss) and Shareholders' (Deficit) Equity

OTHER COMPREHENSIVE INCOME (LOSS) AND SHAREHOLDERS' EQUITY (DEFICIT)

The following tables detail the accumulated other comprehensive income (loss) activity for the 2016 first three quarters and 2015 first three quarters:



($ in millions)	Foreign Currency Translation Adjustments			Derivative Instrument Adjustments			Available-For-Sale Securities Unrealized Adjustments		Accumulated Other Comprehensive Loss
Balance at year-end 2015	$	(192	)	$	(8	)	$	4	$	(196	)
Other comprehensive income (loss) before reclassifications ⁽¹⁾	27			(3		)	—		24
Reclassification of losses from accumulated other comprehensive loss	—			3			—		3
Net other comprehensive income	27			—			—		27
Balance at September 30, 2016	$	(165	)	$	(8	)	$	4	$	(169	)



($ in millions)	Foreign Currency Translation Adjustments			Derivative Instrument Adjustments			Available-For-Sale Securities Unrealized Adjustments			Accumulated Other Comprehensive Loss
Balance at year-end 2014	$	(72	)	$	(9	)	$	11		$	(70	)
Other comprehensive (loss) income before reclassifications ⁽¹⁾	(47		)	9			(5		)	(43		)
Reclassification of losses (gains) from accumulated other comprehensive loss	3			(10		)	—			(7		)
Net other comprehensive loss	(44		)	(1		)	(5		)	(50		)
Balance at September 30, 2015	$	(116	)	$	(10	)	$	6		$	(120	)


(1)	Other comprehensive income (loss) before reclassifications for foreign currency translation adjustments includes intra-entity foreign currency transactions that are of a long-term investment nature. These resulted in a loss of $1 million for the 2016 first three quarters and a gain of $33 million for the 2015 first three quarters.

The following table details the changes in common shares outstanding and shareholders’ equity (deficit) for the 2016 first three quarters:



(in millions, except per share amounts)
Common Shares Outstanding			Total			Class A Common Stock		Additional Paid-in- Capital		Retained Earnings			Treasury Stock, at Cost			Accumulated Other Comprehensive Loss
256.3		Balance at year-end 2015	$	(3,590	)	$	5	$	2,821	$	4,878		$	(11,098	)	$	(196	)
—		Net income	536			—		—		536			—			—
—		Other comprehensive income	27			—		—		—			—			27
—		Cash dividends ($0.85 per share)	(257		)	—		—		(257		)	—			—
1.8		Employee stock plan	64			—		26		(20		)	58			—
(3.7	)	Purchase of treasury stock	(225		)	—		—		—			(225		)	—
136.1		Starwood Combination ⁽¹⁾	9,286			—		2,893		1,238			5,155			—
390.5		Balance at September 30, 2016	$	5,841		$	5	$	5,740	$	6,375		$	(6,110	)	$	(169	)


(1)	Represents Marriott common stock and equity-based awards issued in the Starwood Combination, which also resulted in the depletion of our accumulated historical losses on reissuances of treasury stock in Retained Earnings.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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-Glossary Preferred Stock
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+ Details

Business Segments

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Business Segments

BUSINESS SEGMENTS

We are a diversified global lodging company with operations in the following three reportable business segments, which included the following brands at the end of the 2016 third quarter:


•	North American Full-Service, which includes The Ritz-Carlton, EDITION, JW Marriott, Autograph Collection Hotels, Renaissance Hotels, Marriott Hotels, Delta Hotels and Resorts, and Gaylord Hotels located in the United States and Canada;


•	North American Limited-Service, which includes AC Hotels by Marriott, Courtyard, Residence Inn, SpringHill Suites, Fairfield Inn & Suites, TownePlace Suites, and Moxy Hotels properties located in the United States and Canada; and


•	International, which includes The Ritz-Carlton, Bulgari Hotels & Resorts, EDITION, JW Marriott, Autograph Collection Hotels, Renaissance Hotels, Marriott Hotels, Marriott Executive Apartments, AC Hotels by Marriott, Courtyard, Residence Inn, Fairfield Inn & Suites, Protea Hotels, and Moxy Hotels located outside the United States and Canada.

Due to the timing of the Starwood Combination, it was not practicable to allocate Starwood’s results to our operating segments for the 2016 third quarter. As a result, we included the results of Starwood’s operations for the eight days ended September 30, 2016 in “Other unallocated corporate.”

Our North American Full-Service and North American Limited-Service segments meet the applicable accounting criteria to be reportable business segments. The following four operating segments do not meet the criteria for separate disclosure as reportable business segments: Asia Pacific, Caribbean and Latin America, Europe, and Middle East and Africa, and accordingly, we combined these four operating segments into an “all other category” which we refer to as “International.”

We evaluate the performance of our operating segments using “segment profits” which is based largely on the results of the segment without allocating corporate expenses, income taxes, indirect general, administrative, and other expenses, or merger-related costs and charges. We allocate gains and losses, equity in earnings or losses from our joint ventures, and direct general, administrative, and other expenses to each of our segments. The caption “Other unallocated corporate” in the subsequent discussion represents a portion of our revenues, general, administrative, and other expenses, merger-related costs and charges, equity in earnings or losses, and other gains or losses that we do not allocate to our segments. It also includes license fees we receive from our credit card programs, fees from vacation ownership licensing agreements, and the results of Starwood’s operations for the eight days ended September 30, 2016. See Footnote No. 2, “Acquisitions and Dispositions” for more information on the Starwood Combination.

Our chief operating decision maker monitors assets for the consolidated company but does not use assets by operating segment when assessing performance or making operating segment resource allocations.

Segment Revenues



	Three Months Ended				Nine Months Ended
($ in millions)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
North American Full-Service Segment	$	2,222	$	2,128	$	6,903	$	6,555
North American Limited-Service Segment	936		846		2,675		2,405
International	545		532		1,672		1,623
Total segment revenues	3,703		3,506		11,250		10,583
Other unallocated corporate	239		72		366		197
Total consolidated revenues	$	3,942	$	3,578	$	11,616	$	10,780

Segment Profits



	Three Months Ended						Nine Months Ended
($ in millions)	September 30, 2016			September 30, 2015			September 30, 2016			September 30, 2015
North American Full-Service Segment	$	148		$	126		$	506		$	424
North American Limited-Service Segment	193			180			539			510
International	67			69			217			203
Total segment profits	408			375			1,262			1,137
Other unallocated corporate	(231		)	(28		)	(324		)	(64		)
Interest expense, net of interest income	(46		)	(38		)	(137		)	(102		)
Income taxes	(61		)	(99		)	(265		)	(314		)
Net income	$	70		$	210		$	536		$	657

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Standards	New Accounting Standards Accounting Standards Update No. 2014-09 - “Revenue from Contracts with Customers” (“ASU No. 2014-09”) ASU No. 2014-09 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, as well as most industry-specific guidance, and significantly enhances comparability of revenue recognition practices across entities and industries by providing a principles-based, comprehensive framework for addressing revenue recognition issues. In order for a provider of promised goods or services to recognize as revenue the consideration that it expects to receive in exchange for the promised goods or services, the provider should apply the following five steps: (1) identify the contract with a customer(s); (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU No. 2014-09 also specifies the accounting for some costs to obtain or fulfill a contract with a customer and provides enhanced disclosure requirements. The Financial Accounting Standards Board (“FASB”) has deferred ASU No. 2014-09 for one year, and with that deferral, the standard will be effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, which for us will be our 2018 first quarter. We are permitted to use either the retrospective or the modified retrospective method when adopting ASU No. 2014-09. We are still assessing the potential impact that ASU No. 2014-09 will have on our financial statements and disclosures, but we believe that there could be changes to the revenue recognition of real estate sales, franchise fees, and incentive management fees. Accounting Standards Update No. 2016-02 - “Leases” (“ASU No. 2016-02”) In February 2016, the FASB issued ASU No. 2016-02, which introduces a lessee model that brings substantially all leases onto the balance sheet. Under the new standard, a lessee will recognize on its balance sheet a lease liability and a right-of-use asset for all leases, including operating leases, with a term greater than 12 months. The new standard will also distinguish leases as either finance leases or operating leases. This distinction will affect how leases are measured and presented in the income statement and statement of cash flows. ASU No. 2016-02 is effective for annual and interim periods in fiscal years beginning after December 15, 2018. We are still assessing the potential impact that ASU No. 2016-02 will have on our financial statements and disclosures. Accounting Standards Update No. 2016-09 - “Stock Compensation” (“ASU No. 2016-09”) In March 2016, the FASB issued ASU No. 2016-09, which involves several aspects of the accounting for share-based payments. The new guidance will require excess tax benefits to be recorded as income tax expense (or benefit) in the income statement. Currently, excess tax benefits are recorded in additional paid-in-capital in the balance sheet. In the statement of cash flows, the new guidance requires both excess tax benefits and employee tax withholdings to be presented as operating inflows rather than as financing inflows. ASU No. 2016-09 is effective for annual and interim periods beginning after December 15, 2016. We are still assessing the potential impact that ASU No. 2016-09 will have on our financial statements and disclosures, but we believe that, during periods when our stock price increases, it will generally result in (1) a decrease to our income tax expense and effective tax rate and (2) an increase to our cash flows from operating activities.
Earnings Per Share Dilutive Securities	We compute the effect of dilutive securities using the treasury stock method and average market prices during the period.

Acquisitions and Dispositions Acquisitions and Dispositions (Tables)

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Schedule of Consideration Transferred

The following table presents the results of Starwood operations included in our Income Statements for the eight days from the Merger Date through the end of the 2016 third quarter.



($ in millions)	September 23, 2016 - September 30, 2016
Revenue	$	168
Net loss	$	(131	)

The following table presents the fair value of each class of consideration transferred.



(in millions, except per share amounts)
Equivalent shares of Marriott common stock issued in exchange for Starwood outstanding shares	134.4
Marriott common stock price as of Merger Date	$	68.44
Fair value of Marriott common stock issued in exchange for Starwood outstanding shares	9,198
Cash consideration to Starwood shareholders, net of cash acquired of $1,116	2,412
Fair value of Marriott equity-based awards issued in exchange for vested Starwood equity-based awards	88
Total consideration transferred, net of cash acquired	$	11,698

The following table presents pre-tax merger-related costs and other charges that we incurred in connection with the Starwood Combination.



	Three Months Ended				Nine Months Ended
($ in millions)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
Merger-related costs and charges
Transaction costs	$	18	$	—	$	31	$	—
Employee termination costs	186		—		186		—
Integration costs	24		—		33		—
	228		—		250		—
Interest expense	9		—		22		—
	$	237	$	—	$	272	$	—

Schedule of Fair Value of Assets Acquired and Liabilities Assumed



($ in millions)
Working capital	$	(115	)
Property and equipment	2,045
Identified intangible assets	8,573
Equity and cost method investments	648
Other noncurrent assets	207
Deferred income taxes, net	(1,845		)
Guest loyalty program	(1,647		)
Debt	(1,876		)
Other noncurrent liabilities	(518		)
Net assets acquired	5,472
Goodwill ⁽¹⁾	6,226
	$	11,698


(1)	Goodwill is calculated as total consideration transferred, net of cash acquired, less identified net assets acquired, and it primarily represents the value that we expect to obtain from synergies and growth opportunities from our combined operations. We have not completed the assignment of goodwill to our reporting units as of the date of this report, and it is not deductible for tax purposes.

Schedule of Fair Values of Identified Intangible Assets

The following table presents our preliminary estimates of the fair values of Starwood’s identified intangible assets and their related estimated useful lives.



	Estimated Fair Value (in millions)		Estimated Useful Life (in years)
Brands	$	6,400	indefinite
Management and Operating Lease Agreements	1,394		20-30
Franchise Agreements	729		20-80
Loyalty Program Marketing Rights	50		25-30
	$	8,573

Schedule of Future Minimum Lease Obligations

The following table presents the future minimum lease obligations that we assumed and for which we are the primary obligor as of September 30, 2016:



($ in millions)	Operating Leases		Capital Leases
2016, remaining	$	16	$	3
2017	64		11
2018	61		12
2019	57		12
2020	55		12
Thereafter	630		203
Total minimum lease payments	$	883	$	253
Less: amount representing interest			(86		)
Present value of minimum lease payments			$	167

Schedule of Pro Forma Information



	Nine Months Ended
($ in millions)	September 30, 2016		September 30, 2015
Revenues	$	15,038	$	14,373
Net income	$	853	$	675

Merger-Related Costs and Charges Restructuring Costs (Tables)

9 Months Ended

Sep. 30, 2016

Restructuring and Related Activities [Abstract]

Schedule of Type of Merger-Related Costs and Charges

The following table presents the results of Starwood operations included in our Income Statements for the eight days from the Merger Date through the end of the 2016 third quarter.



($ in millions)	September 23, 2016 - September 30, 2016
Revenue	$	168
Net loss	$	(131	)

The following table presents the fair value of each class of consideration transferred.



(in millions, except per share amounts)
Equivalent shares of Marriott common stock issued in exchange for Starwood outstanding shares	134.4
Marriott common stock price as of Merger Date	$	68.44
Fair value of Marriott common stock issued in exchange for Starwood outstanding shares	9,198
Cash consideration to Starwood shareholders, net of cash acquired of $1,116	2,412
Fair value of Marriott equity-based awards issued in exchange for vested Starwood equity-based awards	88
Total consideration transferred, net of cash acquired	$	11,698

The following table presents pre-tax merger-related costs and other charges that we incurred in connection with the Starwood Combination.



	Three Months Ended				Nine Months Ended
($ in millions)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
Merger-related costs and charges
Transaction costs	$	18	$	—	$	31	$	—
Employee termination costs	186		—		186		—
Integration costs	24		—		33		—
	228		—		250		—
Interest expense	9		—		22		—
	$	237	$	—	$	272	$	—

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Reconciliation of the Earnings (Losses) and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share

The table below presents the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share:



	Three Months Ended				Nine Months Ended
(in millions, except per share amounts)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
Computation of Basic Earnings Per Share
Net income	$	70	$	210	$	536	$	657
Shares for basic earnings per share	266.2		262.2		258.3		270.7
Basic earnings per share	$	0.26	$	0.80	$	2.08	$	2.43
Computation of Diluted Earnings Per Share
Net income	$	70	$	210	$	536	$	657
Shares for basic earnings per share	266.2		262.2		258.3		270.7
Effect of dilutive securities
Employee stock option and appreciation right plans	1.7		2.2		1.8		2.3
Deferred stock incentive plans	0.5		0.6		0.5		0.6
Restricted stock units and restricted stock	2.1		2.3		2.1		2.5
Shares for diluted earnings per share	270.5		267.3		262.7		276.1
Diluted earnings per share	$	0.26	$	0.78	$	2.04	$	2.38

Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Assumptions for SARs

We used the following assumptions as part of a binomial lattice-based valuation to determine the fair value of the SARs we granted during the 2016 first three quarters:



Expected volatility	30.4%
Dividend yield	1.3%
Risk-free rate	1.7 - 1.8%
Expected term (in years)	8 - 10

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Maximum Potential Amount of Future Fundings as the Primary Obligor for Guarantees and the Liability for Expected Future Fundings



($ in millions) Guarantee Type	Maximum Potential Amount of Future Fundings		Recorded Liability for Guarantees
Debt service	$	122	$	22
Operating profit	121		37
Other	8		1
Total guarantees where we are the primary obligor	$	251	$	60

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Long-Term Debt

We provide detail on our long-term debt balances, net of discounts, premiums, and debt issuance costs, in the following table as of the end of the 2016 third quarter and year-end 2015:



	At Period End
($ in millions)	September 30, 2016			December 31, 2015
Senior Notes:
Series H Notes, interest rate of 6.2%, face amount of $289, matured June 15, 2016 (effective interest rate of 6.3%)	$	—		$	289
Series I Notes, interest rate of 6.4%, face amount of $293, maturing June 15, 2017 (effective interest rate of 6.5%)	293			293
Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)	596			595
Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)	348			348
Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)	347			347
Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)	396			395
Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)	446			446
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)	344			343
Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)	742			—
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)	742			—
Commercial paper	1,599			938
Credit Facility	989			—
Other	105			113
Starwood debt:
2018 Senior Notes, interest rate of 6.8%, face amount $371, maturing May 15, 2018 (effective interest rate of 1.6%)	403			—
2019 Senior Notes, interest rate of 7.2%, face amount $210, maturing December 1, 2019 (effective interest rate of 2.2%)	245			—
2023 Senior Notes, interest rate of 3.1%, face amount $350, maturing February 15, 2023 (effective interest rate of 3.1%)	350			—
2025 Senior Notes, interest rate of 3.8%, face amount $350, maturing March 15, 2025 (effective interest rate of 2.8%)	375			—
2034 Senior Notes, interest rate of 4.5%, face amount $300, maturing October 1, 2034 (effective interest rate of 4.1%)	317			—
Capital lease obligations	167			—
Mortgages and other, interest rates ranging from non-interest bearing to 3.7%, various maturities	18			—
	8,822			4,107
Less: Current portion of long-term debt	(316		)	(300		)
	$	8,506		$	3,807

Debt Principal Payments (Net of Discounts, Premiums, and Debt Issuance Costs)

The following table presents future principal payments, net of discounts, premiums, and debt issuance costs, that are due for our debt as of the end of the 2016 third quarter:



Debt Principal Payments ($ in millions)	Amount
2016, remaining	$	17
2017	305
2018	416
2019	856
2020	363
Thereafter	6,865
Balance at September 30, 2016	$	8,822

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
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-Name Accounting Standards Codification
-Topic 505
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-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

Notes Receivable (Tables)

9 Months Ended

Sep. 30, 2016

Receivables [Abstract]

Composition of our Notes Receivable Balances (Net of Reserves and Unamortized Discounts)

The following table presents the composition of our notes receivable balances (net of reserves and unamortized discounts) at the end of the 2016 third quarter and year-end 2015:



	At Period End
($ in millions)	September 30, 2016			December 31, 2015
Senior, mezzanine, and other loans	$	246		$	221
Less current portion	(6		)	(6		)
	$	240		$	215

Notes Receivable Principal Payments (Net of Reserves and Unamortized Discounts) and Interest Rates



Notes Receivable Principal Repayments (net of reserves and unamortized discounts) and Interest Rates ($ in millions)	Amount
2016, remaining	$	4
2017	4
2018	74
2019	16
2020	17
Thereafter	131
Balance at September 30, 2016	$	246
Weighted average interest rate at September 30, 2016	6.8%
Range of stated interest rates at September 30, 2016	0 - 18%

Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities

We present the carrying values and the fair values of noncurrent financial assets and liabilities that qualify as financial instruments, determined under current guidance for disclosures on the fair value of financial instruments, in the following table:



	September 30, 2016						December 31, 2015
($ in millions)	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Senior, mezzanine, and other loans	$	240		$	226		$	215		$	209
Marketable securities	30			30			37			37
Total noncurrent financial assets	$	270		$	256		$	252		$	246

Senior notes	$	(5,650	)	$	(5,828	)	$	(2,766	)	$	(2,826	)
Commercial paper/ Credit Facility	(2,588		)	(2,588		)	(938		)	(938		)
Other long-term debt	(100		)	(111		)	(99		)	(108		)
Other noncurrent liabilities	(63		)	(63		)	(63		)	(63		)
Total noncurrent financial liabilities	$	(8,401	)	$	(8,590	)	$	(3,866	)	$	(3,935	)

Other Comprehensive Income (Loss) and Shareholders' Equity (Deficit) (Tables)

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss) Activity

The following tables detail the accumulated other comprehensive income (loss) activity for the 2016 first three quarters and 2015 first three quarters:



($ in millions)	Foreign Currency Translation Adjustments			Derivative Instrument Adjustments			Available-For-Sale Securities Unrealized Adjustments		Accumulated Other Comprehensive Loss
Balance at year-end 2015	$	(192	)	$	(8	)	$	4	$	(196	)
Other comprehensive income (loss) before reclassifications ⁽¹⁾	27			(3		)	—		24
Reclassification of losses from accumulated other comprehensive loss	—			3			—		3
Net other comprehensive income	27			—			—		27
Balance at September 30, 2016	$	(165	)	$	(8	)	$	4	$	(169	)



($ in millions)	Foreign Currency Translation Adjustments			Derivative Instrument Adjustments			Available-For-Sale Securities Unrealized Adjustments			Accumulated Other Comprehensive Loss
Balance at year-end 2014	$	(72	)	$	(9	)	$	11		$	(70	)
Other comprehensive (loss) income before reclassifications ⁽¹⁾	(47		)	9			(5		)	(43		)
Reclassification of losses (gains) from accumulated other comprehensive loss	3			(10		)	—			(7		)
Net other comprehensive loss	(44		)	(1		)	(5		)	(50		)
Balance at September 30, 2015	$	(116	)	$	(10	)	$	6		$	(120	)


(1)	Other comprehensive income (loss) before reclassifications for foreign currency translation adjustments includes intra-entity foreign currency transactions that are of a long-term investment nature. These resulted in a loss of $1 million for the 2016 first three quarters and a gain of $33 million for the 2015 first three quarters.

Changes in Shareholders' Equity (Deficit)

The following table details the changes in common shares outstanding and shareholders’ equity (deficit) for the 2016 first three quarters:



(in millions, except per share amounts)
Common Shares Outstanding			Total			Class A Common Stock		Additional Paid-in- Capital		Retained Earnings			Treasury Stock, at Cost			Accumulated Other Comprehensive Loss
256.3		Balance at year-end 2015	$	(3,590	)	$	5	$	2,821	$	4,878		$	(11,098	)	$	(196	)
—		Net income	536			—		—		536			—			—
—		Other comprehensive income	27			—		—		—			—			27
—		Cash dividends ($0.85 per share)	(257		)	—		—		(257		)	—			—
1.8		Employee stock plan	64			—		26		(20		)	58			—
(3.7	)	Purchase of treasury stock	(225		)	—		—		—			(225		)	—
136.1		Starwood Combination ⁽¹⁾	9,286			—		2,893		1,238			5,155			—
390.5		Balance at September 30, 2016	$	5,841		$	5	$	5,740	$	6,375		$	(6,110	)	$	(169	)


(1)	Represents Marriott common stock and equity-based awards issued in the Starwood Combination, which also resulted in the depletion of our accumulated historical losses on reissuances of treasury stock in Retained Earnings.

Business Segments (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Segment Revenues



	Three Months Ended				Nine Months Ended
($ in millions)	September 30, 2016		September 30, 2015		September 30, 2016		September 30, 2015
North American Full-Service Segment	$	2,222	$	2,128	$	6,903	$	6,555
North American Limited-Service Segment	936		846		2,675		2,405
International	545		532		1,672		1,623
Total segment revenues	3,703		3,506		11,250		10,583
Other unallocated corporate	239		72		366		197
Total consolidated revenues	$	3,942	$	3,578	$	11,616	$	10,780

Segment Profits



	Three Months Ended						Nine Months Ended
($ in millions)	September 30, 2016			September 30, 2015			September 30, 2016			September 30, 2015
North American Full-Service Segment	$	148		$	126		$	506		$	424
North American Limited-Service Segment	193			180			539			510
International	67			69			217			203
Total segment profits	408			375			1,262			1,137
Other unallocated corporate	(231		)	(28		)	(324		)	(64		)
Interest expense, net of interest income	(46		)	(38		)	(137		)	(102		)
Income taxes	(61		)	(99		)	(265		)	(314		)
Net income	$	70		$	210		$	536		$	657

Acquisitions and Dispositions- Starwood Acquisition (Details) $ / shares in Units, room in Millions, $ in Millions		9 Months Ended
	Sep. 23, 2016 USD ($) hotel brand country property room $ / shares shares	Sep. 30, 2016 USD ($) renewal_option
Business Acquisition [Line Items]
Number of properties \| property	6,000
Number of rooms \| room	1.1
Number of brands \| brand	30
Number of countries \| country	120
Starwood Hotels & Resorts Worldwide, Inc.
Business Acquisition [Line Items]
Payments to acquire businesses (in USD per share) \| $ / shares	$ 21.00
Number of hotels acquired \| hotel	15
Fair value of equity method investments acquired	$ 647
Difference between carrying value and underlying equity of equity method investment	$ 501
Initial lease terms		20 years
Integration costs		$ 54
Transaction and employee termination costs		$ 320
Starwood Hotels & Resorts Worldwide, Inc. \| Vistana Agreement
Business Acquisition [Line Items]
Agreement term	80 years
Annual fixed license fee	$ 30
Starwood Hotels & Resorts Worldwide, Inc. \| Minimum
Business Acquisition [Line Items]
Number of lease renewal terms \| renewal_option		1
Lease renewal terms		5 years
Starwood Hotels & Resorts Worldwide, Inc. \| Maximum
Business Acquisition [Line Items]
Lease renewal terms		10 years
Starwood Hotels & Resorts Worldwide, Inc. \| Common Stock
Business Acquisition [Line Items]
Equity interests issuable per share owned by acquiree (in shares) \| shares	0.80

Acquisitions and Dispositions- Starwood Consideration Transferred (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		9 Months Ended
	Sep. 23, 2016	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Cash consideration to Starwood shareholders, net of cash acquired of $1,116		$ 2,412	$ 137
Starwood Hotels & Resorts Worldwide, Inc.
Business Acquisition [Line Items]
Equivalent shares of Marriott common stock issued in exchange for Starwood outstanding shares (in shares)	134.4
Marriott common stock price as of Merger Date (in USD per share)	$ 68.44
Fair value of Marriott common stock issued in exchange for Starwood outstanding shares	$ 9,198
Cash consideration to Starwood shareholders, net of cash acquired of $1,116	2,412
Fair value of Marriott equity-based awards issued in exchange for vested Starwood equity-based awards	88
Total consideration transferred, net of cash acquired	11,698
Cash acquired	$ 1,116

Acquisitions and Dispositions- Starwood Allocation of Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 23, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 7,175		$ 943
Starwood Hotels & Resorts Worldwide, Inc.
Business Acquisition [Line Items]
Working capital		$ (115)
Property and equipment		2,045
Identified intangible assets		8,573
Equity and cost method investments		648
Other noncurrent assets		207
Deferred income taxes, net		(1,845)
Guest loyalty program		(1,647)
Debt		(1,876)
Other noncurrent liabilities		(518)
Net assets acquired		5,472
Goodwill		6,226
Fair value of assets acquired and liabilities assumed, net		$ 11,698

Acquisitions and Dispositions- Starwood Fair Value and Estimated Useful Lives of Identifiable Intangible Assets (Details) - Starwood Hotels & Resorts Worldwide, Inc. $ in Millions	Sep. 23, 2016 USD ($)
Business Acquisition [Line Items]
Identified intangible assets	$ 8,573
Management and Operating Lease Agreements
Business Acquisition [Line Items]
Estimated fair value, finite-lived intangible assets	1,394
Franchise Agreements
Business Acquisition [Line Items]
Estimated fair value, finite-lived intangible assets	729
Loyalty Program Marketing Rights
Business Acquisition [Line Items]
Estimated fair value, finite-lived intangible assets	50
Brands
Business Acquisition [Line Items]
Estimated fair value, indefinite-lived intangible assets	$ 6,400
Minimum \| Management and Operating Lease Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	20 years
Minimum \| Franchise Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	20 years
Minimum \| Loyalty Program Marketing Rights
Business Acquisition [Line Items]
Estimated Useful Life (in years)	25 years
Maximum \| Management and Operating Lease Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	30 years
Maximum \| Franchise Agreements
Business Acquisition [Line Items]
Estimated Useful Life (in years)	80 years
Maximum \| Loyalty Program Marketing Rights
Business Acquisition [Line Items]
Estimated Useful Life (in years)	30 years

Acquisitions and Dispositions Acquisitions and Dispositions- Starwood Schedule of Operating and Capital Leases Acquired (Details) - Starwood Hotels & Resorts Worldwide, Inc. - Property Lease Guarantee $ in Millions	Sep. 30, 2016 USD ($)
Operating Leases
2016, remaining	$ 16
2017	64
2018	61
2019	57
2020	55
Thereafter	630
Total minimum lease payments	883
Capital Leases
2016, remaining	3
2017	11
2018	12
2019	12
2020	12
Thereafter	203
Total minimum lease payments	253
Less: amount representing interest	(86)
Present value of minimum lease payments	$ 167

Acquisitions and Dispositions- Pro Forma Results of Operations (Details) - Starwood Hotels & Resorts Worldwide, Inc. - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Revenues	$ 15,038	$ 14,373
Net income	$ 853	$ 675

Acquisitions and Dispositions Acquisitions and Dispositions- Starwood Results of Operations (Details) - Starwood Hotels & Resorts Worldwide, Inc. $ in Millions	Sep. 30, 2016 USD ($)
Business Acquisition [Line Items]
Revenue	$ 168
Net loss	$ (131)

Acquisitions and Dispositions - Dispositions and Planned Dispositions (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale		$ 771	$ 78
Disposal Group, Held-for-sale, Not Discontinued Operations \| Hotels Acquired Through Starwood Combination
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale		741
Accrued expenses and other		37
Disposal Group, Held-for-sale, Not Discontinued Operations \| Miami Beach EDITION Residences
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale		30
Accrued expenses and other		$ 3
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| North American, plot of land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from sale of land	$ 46

Merger-Related Costs and Charges Merger-Related Costs and Charges- Types of Merger-related Costs and Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Merger-related costs and charges
Transaction and integration costs	$ 228	$ 0	$ 250	$ 0
Interest expense	55	43	159	121
Liability for severance and other employee termination charges	242		242
Starwood Hotels & Resorts Worldwide, Inc.
Merger-related costs and charges
Transaction costs	18	0	31	0
Transaction and integration costs	228	0	250	0
Interest expense	9	0	22	0
Transaction, integration, and interest costs	237	0	272	0
Employee termination costs \| Starwood Hotels & Resorts Worldwide, Inc.
Merger-related costs and charges
Integration costs	186	0	186	0
Integration costs \| Starwood Hotels & Resorts Worldwide, Inc.
Merger-related costs and charges
Integration costs	$ 24	$ 0	$ 33	$ 0

Earnings Per Share - Reconciliation of the Earnings (Losses) and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Computation of Basic Earnings Per Share
Net income	$ 70	$ 210	$ 536	$ 657
Shares for basic earnings per share (in shares)	266.2	262.2	258.3	270.7
Basic earnings per share (in USD per share)	$ 0.26	$ 0.80	$ 2.08	$ 2.43
Computation of Diluted Earnings Per Share
Net income	$ 70	$ 210	$ 536	$ 657
Shares for basic earnings per share (in shares)	266.2	262.2	258.3	270.7
Effect of dilutive securities
Shares for diluted earnings per share (in shares)	270.5	267.3	262.7	276.1
Diluted earnings per share (in USD per share)	$ 0.26	$ 0.78	$ 2.04	$ 2.38
Employee stock option and appreciation right plans
Effect of dilutive securities
Effect of dilutive securities (in shares)	1.7	2.2	1.8	2.3
Deferred stock incentive plans
Effect of dilutive securities
Effect of dilutive securities (in shares)	0.5	0.6	0.5	0.6
Restricted stock units and restricted stock
Effect of dilutive securities
Effect of dilutive securities (in shares)	2.1	2.3	2.1	2.5

Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 23, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 39	$ 29	$ 98	$ 84
Deferred compensation costs related to unvested awards	$ 177	177		177			$ 116
Restricted Stock Units, Restricted Shares, and Options \| Starwood LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	19
Deferred compensation costs related to unvested awards	$ 87	$ 87		$ 87
Stock awards, vesting period	3 years
RSUs and PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, weighted average grant-date fair value (in USD per share)				$ 63
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, granted (in shares)				1.6
Stock awards, vesting period				4 years
Stock awards, percentage of award vesting and becoming exercisable annually				25.00%
Stock awards, period of service after grant date				1 year
RSUs \| Starwood LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards converted (in shares)						1.1
Restricted Stock \| Starwood LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity awards converted (in shares)						1.6
Options \| Starwood LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options converted (in shares)						0.2
RSUs and Restricted Stock \| Starwood LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value on merger date (in USD per share)						$ 68
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, granted (in shares)				0.4
Stock awards, vesting period				4 years
Stock awards, percentage of award vesting and becoming exercisable annually				25.00%
Stock awards, expiration period				10 years
Stock awards, weighted average grant-date fair value (in USD per share)				$ 22
Stock awards, weighted average exercise price (in USD per share)				$ 67
Executive Officers \| PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, granted (in shares)				0.2
Stock awards, vesting period				3 years
Senior Leaders and Members of Starwood Integration Team \| PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards, granted (in shares)				0.6
Stock awards, vesting period				3 years

Earnings Per Share - Additional Information (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Employee stock option and appreciation right plans
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities not included in the calculation of diluted earnings per share (in shares)	0.3	0.3	0.3	0.2

Share Based Compensation - Assumptions for SARs Granted (Details) - SARs	9 Months Ended
	Sep. 30, 2016
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected volatility	30.40%
Dividend yield	1.30%
Minimum
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Risk-free rate	1.70%
Expected term (in years)	8 years
Maximum
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Risk-free rate	1.80%
Expected term (in years)	10 years

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	46.40%	32.40%	33.10%	32.40%
Valuation Allowance [Line Items]
Unrecognized tax benefits	$ 398		$ 398
Unrecognized tax benefits, current period change			374
Unrecognized tax benefits, increase resulting from current period tax positions			365
Unrecognized tax benefits that, if recognized, would impact the effective tax rate	269		269
Unrecognized tax benefits, where a reversal is reasonably possible within 12 months	$ 38		38
Cash paid for income taxes, net of refunds			243	$ 161
Tax Positions Taken in a Foreign Jurisdiction
Valuation Allowance [Line Items]
Reserve established (released)			5
Valuation Allowance Related To A Capital Loss
Valuation Allowance [Line Items]
Reserve established (released)			$ (15)

Commitments and Contingencies - Guarantees (Details) € in Millions, SGD in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2016 SGD	Sep. 30, 2016 USD ($)	Sep. 30, 2016 EUR (€)	Dec. 30, 2011 USD ($)	Sep. 09, 2005 EUR (€)
Primary Obligor
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		$ 251
Recorded Liability for Guarantees		60
Secondarily Liable
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		48
Secondarily Liable \| MVW Spin-off
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	SGD 5	4
Guarantee obligations, carrying value		1
Other noncurrent liabilities \| Primary Obligor
Commitments and Contingencies Disclosure [Line Items]
Recorded Liability for Guarantees		60
Debt service \| Primary Obligor
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		122
Recorded Liability for Guarantees		22
Debt service \| Primary Obligor \| New York City EDITION Hotel
Commitments and Contingencies Disclosure [Line Items]
Guarantor obligations, term	2 years
Guarantor obligations, extended term	3 years
Debt service \| Primary Obligor \| Not Yet In Effect Condition
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		14
Debt service \| Primary Obligor \| Not Yet In Effect Condition \| New York City EDITION Hotel
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		315
Operating profit \| Primary Obligor
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		121
Recorded Liability for Guarantees		37
Operating profit \| Primary Obligor \| Not Yet In Effect Condition
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		51
Other \| Primary Obligor
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		8
Recorded Liability for Guarantees		1
Lease Obligations and Debt Securities Payable \| Secondarily Liable
Commitments and Contingencies Disclosure [Line Items]
Guarantee obligations, carrying value		2
Debt Securities Payable \| Secondarily Liable
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		13
Debt Securities Payable \| Secondarily Liable \| Sunrise Senior Living Inc
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		2
Debt Securities Payable \| Secondarily Liable \| CNL Retirement Properties Inc
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		11
Property Lease Guarantee \| Secondarily Liable \| Sunrise Senior Living Inc
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		35
Guarantee obligations, cash collateralized				$ 1
Collateral for continuing lease obligation contingency, future minimum annual payments due from 2014 until 2018				1
Property Lease Guarantee \| Secondarily Liable \| Sunrise Senior Living Inc \| Key Bank \| Letter of Credit
Commitments and Contingencies Disclosure [Line Items]
Letter of credit provided by Sunrise, amount available				$ 85
Letter of credit provided by Sunrise, amount available at period end		45
Property Lease Guarantee \| Secondarily Liable \| Renaissance Hotel Group N.V.
Commitments and Contingencies Disclosure [Line Items]
Guarantee obligations, cash collateralized		2	€ 2		€ 35
Annual rent payments, approximately		4
Remaining rent payments, approximately		16
Property Lease Guarantee \| Secondarily Liable \| Lease is Terminated by End of 2019 \| ExecuStay
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings		$ 6
Minimum
Commitments and Contingencies Disclosure [Line Items]
Funding guarantees, term	3 years
Maximum
Commitments and Contingencies Disclosure [Line Items]
Funding guarantees, term	10 years

Commitments and Contingencies - Commitments (Detail) € in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($) entity	Sep. 30, 2016 EUR (€) entity
Commitments and Contingencies Disclosure [Line Items]
Loan commitment	$ 58
Loan commitment expected to be funded in 2016	10
Loan commitment expected to be funded in 2017	28
Loan commitment expected to be funded thereafter	$ 20
Investment in Other Joint Venture Commitment
Commitments and Contingencies Disclosure [Line Items]
Acquisition interests in joint ventures \| entity	2	2
Contingent acquisition period	5 years
Deposits in conjunction with contingent obligation to acquire the interest in joint ventures	$ 20	€ 15
Deposits in conjunction with contingent obligation to acquire the interest in joint ventures, remaining amount	13	€ 11
Information Technology Hardware, Software, Accounting, Finance, and Maintenance Services
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	477
Purchase commitments expected to be funded in 2016	58
Purchase commitments expected to be funded in 2017	157
Purchase commitments expected to be funded in 2018	115
Purchase commitments expected to be funded thereafter	147
Information Technology Hardware, Software, Accounting, Finance, and Maintenance Services \| Starwood Hotels & Resorts Worldwide, Inc.
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments	353
Commitments
Commitments and Contingencies Disclosure [Line Items]
Investment commitments not expected to be funded	41
Full Service and Limited Service \| Equity Investment for Non Controlling Interest in Partnership Commitment
Commitments and Contingencies Disclosure [Line Items]
Investment commitments expected to be funded	2
Investment commitments not expected to be funded	7
Full Service and Limited Service \| Equity Investment for Non Controlling Interest in Partnership Commitment \| Upper Limit
Commitments and Contingencies Disclosure [Line Items]
Investment commitments	$ 9

Commitments and Contingencies - Letters of Credit (Details) $ in Millions	Sep. 30, 2016 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Surety bonds issued	$ 154
Outside Effective Credit Facility
Commitments and Contingencies Disclosure [Line Items]
Letters of credit outstanding	$ 158

Long-Term Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Credit Facility	$ 989		$ 0
Other	105		113
Capital lease obligations	167		0
Total debt	8,822		4,107
Less: Current portion of long-term debt	(316)		(300)
Long-term debt, noncurrent	8,506		3,807
Series H Notes, interest rate of 6.2%, face amount of $289, matured June 15, 2016 (effective interest rate of 6.3%)
Debt Instrument [Line Items]
Senior notes	0		289
Series I Notes, interest rate of 6.4%, face amount of $293, maturing June 15, 2017 (effective interest rate of 6.5%)
Debt Instrument [Line Items]
Senior notes	293		293
Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)
Debt Instrument [Line Items]
Senior notes	596		595
Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Senior notes	348		348
Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)
Debt Instrument [Line Items]
Senior notes	347		347
Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Senior notes	396		395
Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Senior notes	446		446
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)
Debt Instrument [Line Items]
Senior notes	344		343
Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)
Debt Instrument [Line Items]
Senior notes	742		0
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)
Debt Instrument [Line Items]
Senior notes	742		0
2018 Senior Notes, interest rate of 6.8%, face amount $371, maturing May 15, 2018 (effective interest rate of 1.6%)
Debt Instrument [Line Items]
Senior notes	403		0
2019 Senior Notes, interest rate of 7.2%, face amount $210, maturing December 1, 2019 (effective interest rate of 2.2%)
Debt Instrument [Line Items]
Senior notes	245		0
2023 Senior Notes, interest rate of 3.1%, face amount $350, maturing February 15, 2023 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Senior notes	350		0
2025 Senior Notes, interest rate of 3.8%, face amount $350, maturing March 15, 2025 (effective interest rate of 2.8%)
Debt Instrument [Line Items]
Senior notes	375		0
2034 Senior Notes, interest rate of 4.5%, face amount $300, maturing October 1, 2034 (effective interest rate of 4.1%)
Debt Instrument [Line Items]
Senior notes	$ 317		$ 0
Senior Notes \| Series H Notes, interest rate of 6.2%, face amount of $289, matured June 15, 2016 (effective interest rate of 6.3%)
Debt Instrument [Line Items]
Senior notes, stated interest rate			6.20%
Senior notes, face amount			$ 289
Senior notes, effective interest rate			6.30%
Senior Notes \| Series I Notes, interest rate of 6.4%, face amount of $293, maturing June 15, 2017 (effective interest rate of 6.5%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	6.40%		6.40%
Senior notes, face amount	$ 293		$ 293
Senior notes, effective interest rate	6.50%		6.50%
Senior Notes \| Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.00%		3.00%
Senior notes, face amount	$ 600		$ 600
Senior notes, effective interest rate	4.40%		4.40%
Senior Notes \| Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.30%		3.30%
Senior notes, face amount	$ 350		$ 350
Senior notes, effective interest rate	3.40%		3.40%
Senior Notes \| Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.40%		3.40%
Senior notes, face amount	$ 350		$ 350
Senior notes, effective interest rate	3.60%		3.60%
Senior Notes \| Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.10%		3.10%
Senior notes, face amount	$ 400		$ 400
Senior notes, effective interest rate	3.40%		3.40%
Senior Notes \| Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	2.90%		2.90%
Senior notes, face amount	$ 450		$ 450
Senior notes, effective interest rate	3.10%		3.10%
Senior Notes \| Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.80%		3.80%
Senior notes, face amount	$ 350		$ 350
Senior notes, effective interest rate	4.00%		4.00%
Senior Notes \| Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	2.30%	2.30%
Senior notes, face amount	$ 750
Senior notes, effective interest rate	2.50%
Senior Notes \| Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.10%	3.125%
Senior notes, face amount	$ 750
Senior notes, effective interest rate	3.30%
Senior Notes \| 2018 Senior Notes, interest rate of 6.8%, face amount $371, maturing May 15, 2018 (effective interest rate of 1.6%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	6.80%
Senior notes, face amount	$ 371
Senior notes, effective interest rate	1.60%
Senior Notes \| 2019 Senior Notes, interest rate of 7.2%, face amount $210, maturing December 1, 2019 (effective interest rate of 2.2%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	7.20%
Senior notes, face amount	$ 210
Senior notes, effective interest rate	2.20%
Senior Notes \| 2023 Senior Notes, interest rate of 3.1%, face amount $350, maturing February 15, 2023 (effective interest rate of 3.1%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.10%
Senior notes, face amount	$ 350
Senior notes, effective interest rate	3.10%
Senior Notes \| 2025 Senior Notes, interest rate of 3.8%, face amount $350, maturing March 15, 2025 (effective interest rate of 2.8%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.80%
Senior notes, face amount	$ 350
Senior notes, effective interest rate	2.80%
Senior Notes \| 2034 Senior Notes, interest rate of 4.5%, face amount $300, maturing October 1, 2034 (effective interest rate of 4.1%)
Debt Instrument [Line Items]
Senior notes, stated interest rate	4.50%
Senior notes, face amount	$ 300
Senior notes, effective interest rate	4.10%
Commercial Paper
Debt Instrument [Line Items]
Commercial paper	$ 1,599		$ 938
Mortgages and Other
Debt Instrument [Line Items]
Mortgages and other	$ 18		$ 0
Mortgages and Other \| Maximum
Debt Instrument [Line Items]
Senior notes, stated interest rate	3.70%

Long-Term Debt - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 23, 2016	Nov. 09, 2016	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Line of Credit Facility [Line Items]
Interest paid, net of amounts capitalized				$ 99,000,000	$ 71,000,000
Payment for debt extinguishment				296,000,000	7,000,000
Senior notes, cash proceeds from issuance				1,483,000,000	$ 790,000,000
Maximum borrowing capacity under credit facility				4,000,000,000
Available borrowing capacity under credit facility				2,500,000,000
Senior Notes
Line of Credit Facility [Line Items]
Extinguishment of debt, price	101.00%
Senior Notes \| Subsequent Event
Line of Credit Facility [Line Items]
Payment for debt extinguishment		$ 24,000,000
Senior Notes \| 2019 Senior Notes, interest rate of 7.2%, face amount $210, maturing December 1, 2019 (effective interest rate of 2.2%)
Line of Credit Facility [Line Items]
Senior notes, face amount				$ 210,000,000
Senior notes, stated interest rate				7.20%
Senior Notes \| 2019 Senior Notes, interest rate of 7.2%, face amount $210, maturing December 1, 2019 (effective interest rate of 2.2%) \| Subsequent Event
Line of Credit Facility [Line Items]
Extinguishment of debt, principal		1,000,000
Senior Notes \| 2023 Senior Notes, interest rate of 3.1%, face amount $350, maturing February 15, 2023 (effective interest rate of 3.1%)
Line of Credit Facility [Line Items]
Senior notes, face amount				$ 350,000,000
Senior notes, stated interest rate				3.10%
Senior Notes \| 2023 Senior Notes, interest rate of 3.1%, face amount $350, maturing February 15, 2023 (effective interest rate of 3.1%) \| Subsequent Event
Line of Credit Facility [Line Items]
Extinguishment of debt, principal		$ 24,000,000
Senior Notes \| Series Q and R Notes
Line of Credit Facility [Line Items]
Senior notes, face amount			$ 1,500,000,000
Senior notes, cash proceeds from issuance			$ 1,485,000,000
Senior Notes \| Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)
Line of Credit Facility [Line Items]
Senior notes, face amount				$ 750,000,000
Senior notes, stated interest rate			2.30%	2.30%
Senior Notes \| Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)
Line of Credit Facility [Line Items]
Senior notes, face amount				$ 750,000,000
Senior notes, stated interest rate			3.125%	3.10%

Long-Term Debt - Debt Principal Payments (Net of Unamortized Discounts, Premiums, and Debt Issuance Costs) (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
2016, remaining	$ 17
2017	305
2018	416
2019	856
2020	363
Thereafter	6,865
Total debt	$ 8,822	$ 4,107

Notes Receivable - Composition of our Notes Receivable Balances (Net of Reserves and Unamortized Discounts) (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Senior, mezzanine, and other loans	$ 246	$ 221
Less current portion	(6)	(6)
Notes receivable, noncurrent	$ 240	$ 215

Notes Receivable - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Receivables [Abstract]
Notes receivable past due	$ 0		$ 0
Unamortized discounts for notes receivable	23,000,000		23,000,000		$ 31,000,000
Investment in impaired notes receivables	74,000,000		74,000,000		72,000,000
Allowance for credit losses	57,000,000		57,000,000		55,000,000
Exposure to investment in impaired loans	17,000,000		17,000,000		$ 17,000,000
Average investment in impaired notes receivables	$ 74,000,000	$ 71,000,000	$ 73,000,000	$ 67,000,000

Notes Receivable - Principal Payments (Net of Reserves and Unamortized Discounts) and Interest Rates (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
2016, remaining	$ 4
2017	4
2018	74
2019	16
2020	17
Thereafter	131
Senior, mezzanine, and other loans	$ 246	$ 221
Weighted average interest rate at September 30, 2016	6.80%
Range of stated interest rates at September 30, 2016, minimum	0.00%
Range of stated interest rates at September 30, 2016, maximum	18.00%

Fair Value of Financial Instruments - Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans	$ 240	$ 215
Other noncurrent liabilities	(1,580)	(993)
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans	240	215
Marketable securities	30	37
Total noncurrent financial assets	270	252
Senior notes	(5,650)	(2,766)
Commercial paper/ Credit Facility	(2,588)	(938)
Other long-term debt	(100)	(99)
Other noncurrent liabilities	(63)	(63)
Total noncurrent financial liabilities	(8,401)	(3,866)
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans	226	209
Marketable securities	30	37
Total noncurrent financial assets	256	246
Senior notes	(5,828)	(2,826)
Commercial paper/ Credit Facility	(2,588)	(938)
Other long-term debt	(111)	(108)
Other noncurrent liabilities	(63)	(63)
Total noncurrent financial liabilities	$ (8,590)	$ (3,935)

Fair Value of Financial Instruments - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Commercial Paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial paper, maturity term (generally 30 days or less)	30 days
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of our marketable securities	$ 30

Other Comprehensive Income (Loss) and Shareholders' Equity (Deficit) - Accumulated Other Comprehensive (Loss) Income Activity (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			$ (3,590)
Other comprehensive income (loss) before reclassifications			24	$ (43)
Reclassification of losses from accumulated other comprehensive loss	$ 1	$ (3)	3	(7)
Net other comprehensive income (loss)			27	(50)
Balance at end of period	5,841		5,841
Other comprehensive income (loss) before reclassification related to foreign current translation adjustment, gain on intra-equity foreign currency transaction			(1)	33
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(192)	(72)
Other comprehensive income (loss) before reclassifications			27	(47)
Reclassification of losses from accumulated other comprehensive loss			0	3
Net other comprehensive income (loss)			27	(44)
Balance at end of period	(165)	(116)	(165)	(116)
Derivative Instrument Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(8)	(9)
Other comprehensive income (loss) before reclassifications			(3)	9
Reclassification of losses from accumulated other comprehensive loss			3	(10)
Net other comprehensive income (loss)			0	(1)
Balance at end of period	(8)	(10)	(8)	(10)
Available-For-Sale Securities Unrealized Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			4	11
Other comprehensive income (loss) before reclassifications			0	(5)
Reclassification of losses from accumulated other comprehensive loss			0	0
Net other comprehensive income (loss)			0	(5)
Balance at end of period	4	6	4	6
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(196)	(70)
Balance at end of period	$ (169)	$ (120)	$ (169)	$ (120)

Other Comprehensive Income (Loss) and Shareholders' Equity (Deficit) - Changes in Shareholders' Equity (Deficit) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period			$ (3,590)
Balance at beginning of period (in shares)			256.3
Net income	$ 70	$ 210	$ 536	$ 657
Other comprehensive income	4	(32)	27	(50)
Cash dividends ($0.85 per share)			(257)
Employee stock plan			$ 64
Employee stock plan (in shares)			1.8
Purchase of treasury stock			$ (225)
Purchase of treasury stock (in shares)			(3.7)
Starwood Combination			$ 9,286
Starwood Combination (in shares)			136.1
Balance at end of period	$ 5,841		$ 5,841
Balance at end of period (in shares)	390.5		390.5
Cash dividends (in USD per share)			$ 0.85
Additional Paid-in- Capital
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period			$ 2,821
Employee stock plan			26
Starwood Combination			2,893
Balance at end of period	$ 5,740		5,740
Retained Earnings
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period			4,878
Net income			536
Cash dividends ($0.85 per share)			(257)
Employee stock plan			(20)
Starwood Combination			1,238
Balance at end of period	6,375		6,375
Treasury Stock, at Cost
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period			(11,098)
Employee stock plan			58
Purchase of treasury stock			(225)
Starwood Combination			5,155
Balance at end of period	(6,110)		(6,110)
Accumulated Other Comprehensive Loss
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period			(196)	(70)
Other comprehensive income			27
Balance at end of period	(169)	$ (120)	(169)	$ (120)
Class A Common Stock
(Increase) Decrease in Shareholders' Deficit [Roll Forward]
Balance at beginning of period			5
Balance at end of period	$ 5		$ 5

Business Segments - Additional Information (Detail)	9 Months Ended
Business Segments - Additional Information (Detail)	Sep. 30, 2016 segment
Segment Reporting [Abstract]
Number of reportable business segments	3
Number of international operating segments	4

Business Segments - Segment Revenues (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 3,942	$ 3,578	$ 11,616	$ 10,780
Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	3,703	3,506	11,250	10,583
Other unallocated corporate
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	239	72	366	197
North American Full-Service Segment \| Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	2,222	2,128	6,903	6,555
North American Limited-Service Segment \| Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	936	846	2,675	2,405
International \| Total segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 545	$ 532	$ 1,672	$ 1,623

Business Segments - Segment Profits (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	$ 171	$ 339	$ 927	$ 1,040
Interest expense, net of interest income	(46)	(38)	(137)	(102)
Income taxes	(61)	(99)	(265)	(314)
Net income	70	210	536	657
Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	408	375	1,262	1,137
Other unallocated corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	(231)	(28)	(324)	(64)
North American Full-Service Segment \| Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	148	126	506	424
North American Limited-Service Segment \| Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	193	180	539	510
International \| Total segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	$ 67	$ 69	$ 217	$ 203