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Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Accounting policies [line items] |  |  |
Fair value of trust assets | $ 218 | $ 193 |
Depreciation method, property, plant and equipment | All depreciation is charged on a straight-line basis. |  |
Lease expenses per annum | $ 58 | 48 | $ 30
Depreciation,right of use assets | 38 | 35 | 34
Interest expenses on additional lease liabilities | 121 | 101 | 95
Payment of lease liabilites classified as financing activities | (660) | 51 | (471)
Right of use assets | 490 | 513 | 486
Lease liabilities | 660 | 670 |
Net assets liabilities | (1,465) | (1,131) | (1,354)
Impairment Charge | 32 |  |
Trade and other payables | 90 | 132 |
Prepayments | 114 | 108 |
Previously stated [member] |  |  |
Accounting policies [line items] |  |  |
Interest expenses on additional lease liabilities |  | 82 | 76
Payment of lease liabilites classified as financing activities |  | 86 | (446)
Net assets liabilities |  | (1,077) | (1,301)
Increase (decrease) due to application of IFRS 16 [member] |  |  |
Accounting policies [line items] |  |  |
Interest expenses on additional lease liabilities |  | 19 | 19
Payment of lease liabilites classified as financing activities |  | (35) | (25)
Right of use assets |  | 513 | 486
Net assets liabilities |  | (54) | $ (53)
Trade and other payables |  | 35 |
Prepayments |  | 3 |
UK Portfolio [member] |  |  |
Accounting policies [line items] |  |  |
Lease expenses per annum | $ 46 |  |
Remaining lease term | 24 years |  |
Impairment Charge | $ 32 |  |
Impairment on goodwill | 49 |  |
UK Portfolio [member] | Discount rate, measurement input [member] | One percentage point increase [member] |  |  |
Accounting policies [line items] |  |  |
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, assets | 4 |  |
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, liabilities | 1 |  |
UK Portfolio [member] |  |  |
Accounting policies [line items] |  |  |
Impairment Charge | 81 |  |
Fair value gains losses on contingent purchase consideration | 38 |  |
Net impact before tax resulting from the reassessment of the hotel cash flows | 43 |  |
Impairment on goodwill | 49 |  |
UK Portfolio [member] | Revenue per available room [Member] | One percentage point decrease [member] |  |  |
Accounting policies [line items] |  |  |
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, recognised in profit or loss, before tax, assets | 23 |  |
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, recognised in profit or loss, before tax, liabilities | 3 |  |
Loyalty programme liability [member] |  |  |
Accounting policies [line items] |  |  |
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, liabilities | 16 |  |
System Fund [member] | Loyalty programme liability [member] |  |  |
Accounting policies [line items] |  |  |
Deferred revenue | 1,233 | 1,181 |
Management Contract [Member] | Kimpton Management Contract Portfolio [Member] |  |  |
Accounting policies [line items] |  |  |
Impairment Charge | $ 50 |  |
Management Contract [Member] | Kimpton Management Contract Portfolio [Member] | Projected management fees [member] |  |  |
Accounting policies [line items] |  |  |
Reduction in management fees percent | 10.00% |  |
IFRS 16 [member] |  |  |
Accounting policies [line items] |  |  |
Depreciation,right of use assets |  | 35 |
Decrease in operating lease rent expense |  | 51 |
Interest expenses on additional lease liabilities |  | 19 |
Payment of lease liabilites classified as financing activities |  | 43 |
IFRS 16 [member] | PropertyPlant And Equipment Subject To Finance Leases [Member] |  |  |
Accounting policies [line items] |  |  |
Right of use assets |  | 513 |
Lease liabilities |  | 670 |
IFRS 16 [member] | PropertyPlant And Equipment Subject To Finance Leases [Member] | Previously stated [member] |  |  |
Accounting policies [line items] |  |  |
Right of use assets |  | 174 |
Lease liabilities |  | $ 235 |
Management contracts [member] | Kimpton Management Contract Portfolio [Member] | One hotel attrition rate for 2020 [member] |  |  |
Accounting policies [line items] |  |  |
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, assets | $ 3 |  |
Management contracts [member] | Kimpton Management Contract Portfolio [Member] | Discount rate, measurement input [member] | One percentage point increase [member] |  |  |
Accounting policies [line items] |  |  |
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, recognised in profit or loss, before tax, assets | 7 |  |
Management contracts [member] | Kimpton Management Contract Portfolio [Member] | 10% reduction to Projected management fees [member] | Projected management fees [member] |  |  |
Accounting policies [line items] |  |  |
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, recognised in profit or loss, before tax, assets | $ 9 |  |
Software [member] |  |  |
Accounting policies [line items] |  |  |
Amortisation method, intangible assets other than goodwill | straight-line |  |
Maximum [member] | Buildings [member] |  |  |
Accounting policies [line items] |  |  |
Estimated useful lives | 0 years |  |
Maximum [member] | Fixtures, fittings and equipment [member] |  |  |
Accounting policies [line items] |  |  |
Estimated useful lives | 0 years |  |
Maximum [member] | Software [member] |  |  |
Accounting policies [line items] |  |  |
Estimated useful lives | 5 years |  |
Minimum [member] | Fixtures, fittings and equipment [member] |  |  |
Accounting policies [line items] |  |  |
Estimated useful lives | 3 years |  |
Minimum [member] | Software [member] |  |  |
Accounting policies [line items] |  |  |
Estimated useful lives | 3 years |  |

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