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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, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | $ 1,156 | $ 1,072 | $ 1,046
Incentive management fees | 160 | 150 | 136
Central revenue | 170 | 157 | 147
Revenue from fee business | 1,486 | 1,379 | 1,329
Revenue from owned, leased and managed lease hotels | 447 | 351 | 338
System Fund revenues | 1,233 | 1,242 | 1,199
Reimbursement of costs | 1,171 | 1,103 | 1,046
Total revenue | 4,337 | 4,075 | 3,912
Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 1,933 | 1,730 | 1,667
Americas [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 835 | 795 | 781
Incentive management fees | 18 | 16 | 15
Central revenue | 0 |  |
Revenue from fee business | 853 | 811 | 796
Revenue from owned, leased and managed lease hotels | 198 | 188 | 173
Americas [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 1,051 | 999 | 969
EMEAA [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 227 | 204 | 194
Incentive management fees | 93 | 90 | 80
Central revenue | 0 |  |
Revenue from fee business | 320 | 294 | 274
Revenue from owned, leased and managed lease hotels | 249 | 163 | 165
EMEAA [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 569 | 457 | 439
Greater China [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Franchise and base management fees | 94 | 73 | 71
Incentive management fees | 49 | 44 | 41
Central revenue | 0 |  |
Revenue from fee business | 143 | 117 | 112
Revenue from owned, leased and managed lease hotels | 0 |  |
Greater China [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | 143 | 117 | 112
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 | 170 | 157 | 147
Revenue from fee business | 170 | 157 | 147
Revenue from owned, leased and managed lease hotels | 0 |  |
Central [member] | Reportable segments [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Total revenue | $ 170 | $ 157 | $ 147

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