XML 91 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 20, 2020
Jun. 28, 2019
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 1-13881    
Entity Registrant Name MARRIOTT INTERNATIONAL INC /MD/    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 52-2055918    
Entity Address, Address Line One 10400 Fernwood Road    
Entity Address, City or Town Bethesda    
Entity Address, State or Province MD    
Entity Address, Postal Zip Code 20817    
City Area Code 301    
Local Phone Number 380-3000    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 38,730,375,024
Entity Common Stock, Shares Outstanding   324,214,545  
Documents Incorporated by Reference
Portions of the Proxy Statement prepared for the 2020 Annual Meeting of Shareholders are incorporated by reference into Part III of this report.
    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001048286    
Current Fiscal Year End Date --12-31    
Nasdaq Global Select Market      
Entity Information [Line Items]      
Title of 12(b) Security Class A Common Stock, $0.01 par value    
Trading Symbol MAR    
Security Exchange Name NASDAQ    
Chicago Stock Exchange      
Entity Information [Line Items]      
Title of 12(b) Security Class A Common Stock, $0.01 par value    
Trading Symbol MAR    
Security Exchange Name CHX