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Leases - Additional Information (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) Leases | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Disclosure Of Information Leases [Line Items] |  |  |
Cash payments leases | $ 104 | $ 159 | $ 132
Weighted average remaining lease term | 53 years |  |
Percentage of right of use assets value | 92.00% |  |
Cash payments leases-financing activities | $ 65 | 59 | 35
Cash payments leases-operating activities | 39 | 100 | 97
Undiscounted cash flows | 0 | 3 |
Undiscounted cash flows receivable | 2 | 3 | $ 3
Gain loss on derecoginition of leases | 30 |  |
System Fund impairment charge | (32) |  |
Undiscounted rent payable amount | 3,505 | $ 3,857 |
Americas [member] | Reportable segments [member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Impairment charges right of use assets | 43 |  |
System Fund impairment charge | $ 32 |  |
Right-of-use assets [member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Description of extended lease term | 20-year |  |
Period over which management has projected cash flows | five-year |  |
Growth rate used to extrapolate cash flow projections | 8.80% |  |
Right-of-use assets [member] | EMEAA [Member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Impairment loss | $ 5 |  |
Eight Priority Leases [member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Number of top leases | Leases | 8 |  |
Undiscounted rent payable amount | $ 288 |  |
SVC Portfolio [Member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Gain loss on derecoginition of leases | $ 30 |  |
Lease Period Extension [member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Number of leases having extension option not included in calculation | Leases | 1 |  |
Bottom of range [member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Lease Term | 1 year |  |
Top of range [member] |  |  |
Disclosure Of Information Leases [Line Items] |  |  |
Lease Term | 99 years |  |

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- Definition Disclosure Of Information Leases + References No definition available. + Details
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- Definition Lease Right Of Use Assets System Fund Impairment Charge + References No definition available. + Details
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