Annual report pursuant to Section 13 and 15(d)

Revenue Recognition (Disaggregation of Net Revenues) (Details)

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Revenue Recognition (Disaggregation of Net Revenues) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues $ 1,245 $ 950 $ 1,430
Net revenues 1,565 1,300 2,053
Concessions of hotel-management fees for past services     20
Royalties and franchise fees      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 461 328 480
Marketing, reservation and loyalty      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 468 370 562
License and other fees      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 79 84 131
Other      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 120 104 132
Hotel Franchising | Royalties and franchise fees      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 436 309 465
Hotel Franchising | Marketing, reservation and loyalty      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 467 369 559
Hotel Franchising | License and other fees      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 79 84 131
Hotel Franchising | Other      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 117 101 124
Hotel Management | Royalties and franchise fees      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 25 19 15
Hotel Management | Marketing, reservation and loyalty      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 1 1 3
Hotel Management | Hotel management - owned properties      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 82 37 89
Hotel Management | Hotel management - managed properties      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 35 27 36
Hotel Management | Cost reimbursements      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 320 350 623
Hotel Management | Other      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 3 3 2
Reportable Segments | Hotel Franchising      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 1,099 863 1,279
Net revenues 1,099 863 1,279
Reportable Segments | Hotel Management      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues 466 437 768
Net revenues 466 437 768
Corporate and Other      
Disaggregation of Revenue [Line Items]      
Fee-related and other revenues $ 0 $ 0 $ 6