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Financial risk management and derivative financial instruments - Disclosure of Detailed Information About Hedging Instruments (Detail) £ in Millions, Euro in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) Euro GBP (£) | Dec. 31, 2023 USD ($)
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Fair value | $ | $ (90) | $ (14)
Cash flow hedge of November 2018 [Member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Maturity | May 2027 |
Hedging instrument-Risk | Foreign exchange |
Hedging instrument-Type | Cash flow |
Hedging instrument-Hedged item | €500m 2.125% bonds 2027 |
Cash flow hedge of November 2018 [Member] | Pay Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Payleg | £ | 436 |
Cash flow hedge of November 2018 [Member] | Pay Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 3.50% |
Cash flow hedge of November 2018 [Member] | Receive Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Receive leg | Euro | 500 |
Cash flow hedge of November 2018 [Member] | Receive Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 2.125% |
Cash flow hedge of October 2020 [Member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Maturity | October 2024 |
Hedging instrument-Risk | Foreign exchange |
Hedging instrument-Type | Cash flow |
Hedging instrument-Hedged item | €500m 1.625% bonds 2024 |
Cash flow hedge of October 2020 [Member] | Pay Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Payleg | £ | 454 |
Cash flow hedge of October 2020 [Member] | Pay Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 2.70% |
Cash flow hedge of October 2020 [Member] | Receive Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Receive leg | Euro | 500 |
Cash flow hedge of October 2020 [Member] | Receive Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 1.625% |
Cash flow hedge of November 2023 [Member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Maturity | November 2029 |
Hedging instrument-Risk | Foreign exchange |
Hedging instrument-Type | Cash flow |
Hedging instrument-Hedged item | €600m 4.375% bonds 2029 |
Cash flow hedge of November 2023 [Member] | Pay Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Payleg | $ | 657 |
Cash flow hedge of November 2023 [Member] | Pay Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 6.00% |
Cash flow hedge of November 2023 [Member] | Receive Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Receive leg | Euro | 600 |
Cash flow hedge of November 2023 [Member] | Receive Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 4.375% |
Cash flow hedge of September 2024 [Member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Maturity | September 2031 |
Hedging instrument-Risk | Foreign exchange |
Hedging instrument-Type | Cash flow |
Hedging instrument-Hedged item | €750m 3.625% bonds 2031 |
Cash flow hedge of September 2024 [Member] | Pay Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Payleg | $ | 834 |
Cash flow hedge of September 2024 [Member] | Pay Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 4.90% |
Cash flow hedge of September 2024 [Member] | Receive Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Receive leg | Euro | 750 |
Cash flow hedge of September 2024 [Member] | Receive Hedging Instrument [member] | Fixed interest rate [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Interest rate | 3.625% |
Net investment hedge of October 2023 [Member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument - Maturity | October 2028 |
Hedging instrument-Risk | Spot foreign exchange |
Hedging instrument-Type | Net investment |
Hedging instrument-Hedged item | Net assets of specified subsidiaries with US dollar foreign currency |
Net investment hedge of October 2023 [Member] | Pay Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Payleg | $ | 425 |
Net investment hedge of October 2023 [Member] | Receive Hedging Instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Hedging instrument- Receive leg | £ | 344 |

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- Definition The average rate of a hedging instrument. [Refer: Hedging instruments [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 23B -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_23B_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The nominal amount of a hedging instrument. [Refer: Hedging instruments [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 23B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_23B_a&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 24A -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24A_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Description of Hedgeinstrument maturity + References No definition available. + Details
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- Definition Description of nature of hedging instrument fair value. + References No definition available. + Details
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- Definition Description of nature of hedging instrument type. + References No definition available. + Details
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- Definition Description of nature of hedging type. + References No definition available. + Details
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- Definition Nominal amounts of hedging instrument. + References No definition available. + Details
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