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Accounting policies - Additional Information (Detail) £ in Millions, $ in Millions |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2020 USD ($) | Mar. 31, 2021 GBP (£) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jun. 30, 2022 USD ($)
Accounting policies [line items] |  |  |  |  |  |  |  |
Depreciation method, property, plant and equipment |  |  | All depreciation is charged on a straight-line basis |  |  |  |  |
Undrawn bank facilities |  |  | $ 1,350 |  |  |  |  |
Cash and cash equivalents |  |  | 1,450 | $ 1,675 |  |  |  |
Total liquidity |  |  | 2,655 |  |  |  |  |
Repayment of Debt on maturity under consideration amount |  |  |  | 290 |  |  |  |
Covenant Liquidity |  |  | 400 |  |  |  | $ 400 | $ 400
Net cash from operating activities |  |  | $ 636 | $ 137 | $ 653 |  |  |
Payment terms of trade receivables |  |  | 30 days |  |  |  |  |
Percentage increase in revenue per room |  |  |  | 46.00% | 70.00% |  |  |
2022 [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Revenue per room as a percentage of previous year |  |  | 70.00% |  |  |  |  |
Downside [member] | 2022 [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Percentage reduction in the growth of revenue per room |  |  | 8.00% |  |  |  |  |
Credit risk [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Percentage of provision on debt gross |  |  | 25.00% |  |  |  |  |
Increase decrease in expected credit loss |  |  | $ 5 |  |  |  |  |
Credit risk [member] | Past due more than 270 days [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Increase decrease in expected credit loss |  |  | $ 9 |  |  |  |  |
Percentage of collection rate |  |  | 10.00% |  |  |  |  |
Credit risk [member] | Change In Payment Plans [Member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Increase decrease in expected credit loss |  |  | $ 16 |  |  |  |  |
Three Point Eight Seven Five Percentage Four Hundred Million Euro Twenty Twenty two [Member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Bond interest rate | 3.875% |  |  |  |  |  |  |
Maturity date | November 2022 |  |  |  |  |  |  |
Repayment of Debt on maturity under consideration amount | $ 173 |  |  |  |  |  |  |
UK Covid Corporate Financing Facility [Member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Repayment of commercial paper | £ |  | £ 600 |  |  |  |  |  |
Overdraft [Member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 1,305 |  |  |  |  |
Levels of Existing Cash Reserves Available [Member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  | $ 1,000 |  |
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 |  |  | 55 |  |  |  |  |
Loyalty programme liability [member] | System Fund [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Deferred revenue |  |  | $ 1,292 | $ 1,245 | $ 1,233 |  |  |
Software [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Amortisation method, intangible assets other than goodwill |  |  | straight-line |  |  |  |  |
Maximum [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Covenant Liquidity |  |  | $ 400 |  |  |  |  |
Maximum [member] | Buildings [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Estimated useful lives |  |  | 50 years |  |  |  |  |
Maximum [member] | Fixtures, fittings and equipment [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Estimated useful lives |  |  | 25 years |  |  |  |  |
Maximum [member] | Software [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Estimated useful lives |  |  | 5 years |  |  |  |  |
Maximum [member] | Software [member] | Guest Reservation System [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Estimated useful lives |  |  | 10 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 |  |  |  |  |
Minimum [member] | Software [member] | Guest Reservation System [member] |  |  |  |  |  |  |  |
Accounting policies [line items] |  |  |  |  |  |  |  |
Estimated useful lives |  |  | 8 years |  |  |  |  |

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- Definition The depreciation method used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition Accounting policies. + References No definition available. + Details
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- Definition Covenant liquidity. + References No definition available. + Details
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- Definition Increase decrease in expected credit loss. + References No definition available. + Details
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