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Revenue - Summary of Group Revenue Disaggregated By Type of Revenue Stream and By Reportable Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | $ 894 | $ 606 | $ 1,174
Incentive management fees | 62 | 35 | 151
Central revenue | 197 | 182 | 185
Revenue from fee business | 1,153 | 823 | 1,510
Revenue from owned, leased and managed lease hotels | 237 | 169 | 573
System Fund revenues | 928 | 765 | 1,373
Reimbursement of costs | 589 | 637 | 1,171
Total revenue | 2,907 | 2,394 | 4,627
Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 1,390 | 992 | 2,083
Americas [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 683 | 452 | 840
Incentive management fees | 8 | 5 | 13
Revenue from fee business | 691 | 457 | 853
Revenue from owned, leased and managed lease hotels | 83 | 55 | 187
Americas [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 774 | 512 | 1,040
EMEAA [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 120 | 93 | 247
Incentive management fees | 29 | 14 | 90
Revenue from fee business | 149 | 107 | 337
Revenue from owned, leased and managed lease hotels | 154 | 114 | 386
EMEAA [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 303 | 221 | 723
Greater China [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 91 | 61 | 87
Incentive management fees | 25 | 16 | 48
Revenue from fee business | 116 | 77 | 135
Greater China [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 116 | 77 | 135
Central [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 0 |  |
Incentive management fees | 0 |  |
Central revenue | 197 | 182 | 185
Revenue from fee business | 197 | 182 | 185
Central [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | $ 197 | $ 182 | $ 185

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