Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | $ 399 | $ 1,215 | $ 1,642 | $ 3,745 |
Rooms revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 41 | 252 | 226 | 794 |
Food and beverage | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 20 | 134 | 128 | 461 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 19 | 44 | 68 | 135 |
Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 80 | 430 | 422 | 1,390 |
Base management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 19 | 64 | 74 | 195 |
Incentive management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 6 | 33 | 12 | 106 |
Franchise fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 15 | 37 | 48 | 107 |
Other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 7 | 8 | 16 | 21 |
License fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 5 | 6 | 30 | 18 |
Management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 52 | 148 | 180 | 447 |
Amortization of management and franchise agreement assets constituting payments to customers | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (7) | (5) | (20) | (16) |
Net management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 45 | 143 | 160 | 431 |
Other revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 7 | 25 | 45 | 98 |
Revenues for the reimbursement of costs incurred on behalf of managed and franchised properties | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 267 | 617 | 1,015 | 1,826 |
Operating segments | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 82 | 441 | 432 | 1,417 |
Operating segments | Owned and leased hotels | Rooms revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 43 | 263 | 236 | 821 |
Operating segments | Owned and leased hotels | Food and beverage | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 20 | 134 | 128 | 461 |
Operating segments | Owned and leased hotels | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 19 | 44 | 68 | 135 |
Operating segments | Owned and leased hotels | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 82 | 441 | 432 | 1,417 |
Operating segments | Owned and leased hotels | Base management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Incentive management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Franchise fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | License fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Amortization of management and franchise agreement assets constituting payments to customers | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Net management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Other revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Owned and leased hotels | Revenues for the reimbursement of costs incurred on behalf of managed and franchised properties | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Americas management and franchising | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 262 | 685 | 1,045 | 2,079 |
Operating segments | Americas management and franchising | Rooms revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Americas management and franchising | Food and beverage | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Americas management and franchising | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Americas management and franchising | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | Americas management and franchising | Base management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 12 | 56 | 60 | 175 |
Operating segments | Americas management and franchising | Incentive management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 13 | 1 | 46 |
Operating segments | Americas management and franchising | Franchise fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 15 | 36 | 47 | 104 |
Operating segments | Americas management and franchising | Other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 1 | 2 | 3 | 3 |
Operating segments | Americas management and franchising | License fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 1 | 1 | 10 | 3 |
Operating segments | Americas management and franchising | Management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 29 | 108 | 121 | 331 |
Operating segments | Americas management and franchising | Amortization of management and franchise agreement assets constituting payments to customers | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (5) | (4) | (13) | (11) |
Operating segments | Americas management and franchising | Net management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 24 | 104 | 108 | 320 |
Operating segments | Americas management and franchising | Other revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 4 | 16 | 33 | 71 |
Operating segments | Americas management and franchising | Revenues for the reimbursement of costs incurred on behalf of managed and franchised properties | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 234 | 565 | 904 | 1,688 |
Operating segments | ASPAC management and franchising | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 35 | 62 | 102 | 175 |
Operating segments | ASPAC management and franchising | Rooms revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | ASPAC management and franchising | Food and beverage | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | ASPAC management and franchising | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | ASPAC management and franchising | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | ASPAC management and franchising | Base management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 7 | 11 | 16 | 33 |
Operating segments | ASPAC management and franchising | Incentive management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 5 | 17 | 8 | 51 |
Operating segments | ASPAC management and franchising | Franchise fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 1 | 1 | 3 |
Operating segments | ASPAC management and franchising | Other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 4 | 3 | 8 | 9 |
Operating segments | ASPAC management and franchising | License fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 1 | 0 | 9 | 0 |
Operating segments | ASPAC management and franchising | Management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 17 | 32 | 42 | 96 |
Operating segments | ASPAC management and franchising | Amortization of management and franchise agreement assets constituting payments to customers | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | (2) | (1) |
Operating segments | ASPAC management and franchising | Net management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 17 | 32 | 40 | 95 |
Operating segments | ASPAC management and franchising | Other revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | ASPAC management and franchising | Revenues for the reimbursement of costs incurred on behalf of managed and franchised properties | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 18 | 30 | 62 | 80 |
Operating segments | EAME/SW Asia management and franchising | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 17 | 40 | 58 | 108 |
Operating segments | EAME/SW Asia management and franchising | Rooms revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | EAME/SW Asia management and franchising | Food and beverage | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | EAME/SW Asia management and franchising | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | EAME/SW Asia management and franchising | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | EAME/SW Asia management and franchising | Base management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 2 | 10 | 10 | 27 |
Operating segments | EAME/SW Asia management and franchising | Incentive management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 2 | 9 | 4 | 26 |
Operating segments | EAME/SW Asia management and franchising | Franchise fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | EAME/SW Asia management and franchising | Other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 1 | 2 | 3 | 5 |
Operating segments | EAME/SW Asia management and franchising | License fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | EAME/SW Asia management and franchising | Management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 5 | 21 | 17 | 58 |
Operating segments | EAME/SW Asia management and franchising | Amortization of management and franchise agreement assets constituting payments to customers | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (2) | (1) | (5) | (4) |
Operating segments | EAME/SW Asia management and franchising | Net management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 3 | 20 | 12 | 54 |
Operating segments | EAME/SW Asia management and franchising | Other revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Operating segments | EAME/SW Asia management and franchising | Revenues for the reimbursement of costs incurred on behalf of managed and franchised properties | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 14 | 20 | 46 | 54 |
Corporate and other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 8 | 17 | 28 | 49 |
Corporate and other | Rooms revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Food and beverage | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Base management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Incentive management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Franchise fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 1 | 1 | 2 | 4 |
Corporate and other | License fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 3 | 5 | 11 | 15 |
Corporate and other | Management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 4 | 6 | 13 | 19 |
Corporate and other | Amortization of management and franchise agreement assets constituting payments to customers | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Corporate and other | Net management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 4 | 6 | 13 | 19 |
Corporate and other | Other revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 3 | 9 | 12 | 26 |
Corporate and other | Revenues for the reimbursement of costs incurred on behalf of managed and franchised properties | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 1 | 2 | 3 | 4 |
Eliminations | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (5) | (30) | (23) | (83) |
Eliminations | Rooms revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (2) | (11) | (10) | (27) |
Eliminations | Food and beverage | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Eliminations | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Eliminations | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (2) | (11) | (10) | (27) |
Eliminations | Base management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (2) | (13) | (12) | (40) |
Eliminations | Incentive management fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (1) | (6) | (1) | (17) |
Eliminations | Franchise fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Eliminations | Other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Eliminations | License fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Eliminations | Management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (3) | (19) | (13) | (57) |
Eliminations | Amortization of management and franchise agreement assets constituting payments to customers | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Eliminations | Net management, franchise, and other fees | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | (3) | (19) | (13) | (57) |
Eliminations | Other revenues | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 1 |
Eliminations | Revenues for the reimbursement of costs incurred on behalf of managed and franchised properties | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 0 | 0 | 0 |
Eliminations | Owned and leased hotels | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 2 | 11 | 10 | 27 |
Eliminations | Americas management and franchising | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 3 | 15 | 12 | 49 |
Eliminations | ASPAC management and franchising | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | 0 | 1 | 0 | 1 |
Eliminations | EAME/SW Asia management and franchising | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenues | $ 0 | $ 3 | $ 1 | $ 7 |