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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, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | $ 606 | $ 1,174 | $ 1,156
Incentive management fees | 35 | 151 | 160
Central revenue | 182 | 185 | 170
Revenue from fee business | 823 | 1,510 | 1,486
Revenue from owned, leased and managed lease hotels | 169 | 573 | 447
System Fund revenues | 765 | 1,373 | 1,233
Reimbursement of costs | 637 | 1,171 | 1,171
Total revenue | 2,394 | 4,627 | 4,337
Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 992 | 2,083 | 1,933
Americas [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 452 | 840 | 835
Incentive management fees | 5 | 13 | 18
Revenue from fee business | 457 | 853 | 853
Revenue from owned, leased and managed lease hotels | 55 | 187 | 198
Americas [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 512 | 1,040 | 1,051
EMEAA [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 93 | 247 | 227
Incentive management fees | 14 | 90 | 93
Revenue from fee business | 107 | 337 | 320
Revenue from owned, leased and managed lease hotels | 114 | 386 | 249
EMEAA [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 221 | 723 | 569
Greater China [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 61 | 87 | 94
Incentive management fees | 16 | 48 | 49
Revenue from fee business | 77 | 135 | 143
Greater China [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 77 | 135 | 143
Central [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Central revenue | 182 | 185 | 170
Revenue from fee business | 182 | 185 | 170
Central [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | $ 182 | $ 185 | $ 170

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- Definition The amount of income arising from franchise fees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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