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Derivatives - Summary of maturity of the nominal amount of the hedge instrument (Details) - Interest rate swaps - Fair value hedges - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Disclosure of detailed information about hedging instruments [line items] |  |
Interest rate risk | 2,883 | 3,805
Within 3 months |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Interest rate risk | 898 | 833
Average fixed interest rate | 2.20% | 3.50%
Later than three months and not later than one year |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Interest rate risk | 1,557 | 2,000
Average fixed interest rate | 1.90% | 2.80%
Later than one year |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Interest rate risk | 428 | 972
Average fixed interest rate | 1.90% | 2.20%

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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 2025-01-01 -Paragraph 23B -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_23B_b&doctype=Standard -URIDate 2025-03-27 + 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 2025-01-01 -Paragraph 23B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_23B_a&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2025-01-01 -Paragraph 24A -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_24A_d&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 60 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_60_d&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 60 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_60_d&doctype=Standard -URIDate 2025-03-27 + Details
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- Details
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