v2.4.0.6
Document and Entity Information
3 Months Ended
Mar. 31, 2013
Apr. 19, 2013
Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q1  
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   307,129,596