v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2010
Jan. 28, 2011
Jun. 18, 2010
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2010    
Document Fiscal Year Focus 2010    
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 --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   367,937,640  
Entity Public Float     $ 9,920,558,833