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Exceptional Items - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 GBP (£) | Dec. 31, 2020 EUR (€)
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Derecognition of right-of-use assets |  |  | $ 22 |  |
Derecognition of lease liabilities |  |  | 71 |  |
Gain on termination of lease |  |  | 30 |  |
Repayments of bonds, notes and debentures | $ 209 |  | 290 |  |
Provisions charged to income statement (incl onerous contracts) | 54 |  |  |  |
Impairment loss on financial assets | 5 | $ 0 | 88 |  |
Derecognition of right of use assets and lease liabilities | $ 0 |  | $ 22 |  |
Applicable tax rate | 19.00% | 19.00% | 19.00% | 19.00% |
Tax rate effect from change in tax rate | 0.10% |  | 0.50% | 0.50% |
Current tax benefit | $ 183 | $ 139 | $ 43 |  |
Decrease through impairment, contract assets | (5) |  |  |  |
Increase Through Impairment Contract Assets | 3 | $ 0 |  |  |
Associates [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Additional Expenses Allocated | 60 |  |  |  |
Current tax benefit | 15 |  |  |  |
Liability Recognised Reflecting Unavoidable Obligation Amount | $ 18 |  |  |  |
Right-of-use assets [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Derecognition of right of use assets net book value |  |  | 49 |  |
2022 Bonds [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Notional amount | £ |  |  |  | £ 400 |
Repayments of bonds, notes and debentures | £ |  |  |  | £ 227 |
Bond interest rate |  |  |  | 3.875% | 3.875%
Maturity date | 8 October 2022 |  |  |  |
2024 Bonds [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Notional amount | € |  |  |  |  | € 500
Bond interest rate |  |  |  | 1.625% | 1.625%
Maturity date | 8 october 2024 |  |  |  |
2028 Bonds [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Notional amount | £ |  |  |  | £ 400 |
Bond interest rate |  |  |  | 3.375% | 3.375%
Maturity date | 8 October 2028 |  |  |  |
UK Portfolio [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Derecognition of right of use assets and lease liabilities |  |  | 18 |  |
UK Portfolio [member] | Right-of-use assets [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Derecognition of right of use assets net book value |  |  | 22 |  |
Lease Liability [Member] | UK Portfolio [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Derecognition of right of use assets net book value |  |  | 40 |  |
Exceptional items [member] | Onerous Contracts Provisions [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Provisions charged to income statement (incl onerous contracts) |  |  | (10) |  |
Exceptional items [member] | EMEAA [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Litigation settlement amount |  |  | 14 |  |
Exceptional items [member] | UK Portfolio [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Reorganisation costs |  |  | 4 |  |
Derecognition of right of use assets and lease liabilities |  |  | 18 |  |
Exceptional items [member] | UK Portfolio [member] | Cost of Sales [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Reorganisation costs |  |  | (4) |  |
Exceptional items [member] | UK Portfolio [member] | Onerous Contracts Provisions [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Provisions charged to income statement (incl onerous contracts) |  |  | 10 |  |
Tax on exceptional items [member] | Cost of Sales [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Reorganisation costs |  |  | 4 |  |
Gain on Lease Termination [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Derecognition of right-of-use assets |  |  | 60 |  |
Derecognition of lease liabilities |  |  | 90 |  |
Exceptional Tax Items [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Applicable tax rate |  | 19.00% |  |  |
Tax rate effect from change in tax rate |  | 25.00% |  |  |
Deferred tax credit arising from remasurement of Siginificant US deferred tax reforms |  | $ 4 |  |  |
Tax effect from change in tax rate |  | $ 34 |  |  |
System Fund [member] | Exceptional items [member] | Administrative Expenses [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Reorganisation costs |  |  | 20 |  |
SVC [Member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Impairment loss on financial assets |  |  | 33 |  |
Impairment loss on contract assets |  |  | 33 |  |
Trade deposits and loans [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Impairment loss on financial assets |  |  | 15 |  |
Key money and performance guarantee payments on individual properties [member] |  |  |  |  |
Disclosure Of Exceptional Items [line items] |  |  |  |  |
Impairment loss on contract assets |  |  | $ 20 |  |

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