v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Dec. 28, 2012
Feb. 08, 2013
Jun. 15, 2012
Entity Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 28, 2012    
Document Fiscal Year Focus 2012    
Document Fiscal Period Focus FY    
Trading Symbol MAR    
Entity Registrant Name MARRIOTT INTERNATIONAL INC /MD/    
Entity Central Index Key 0001048286    
Current Fiscal Year End Date --12-28    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Common Stock, Shares Outstanding   312,344,872  
Entity Public Float     $ 9,350,052,179