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Derivatives and hedge accounting - Maturity derivatives designated in net investment hedging (Details) - - hedges of net investments in foreign operations - Derivatives - – FX forwards and Cross currency swaps - Net payer and receiver swap number in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of detailed information about hedges [line items] |  |
Nominal value | (10,672) | (8,899)
Less than 1 month |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value | (6,009) | (6,164)
1 to 3 months |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value | (4,576) | (2,638)
3 to 12 months |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value | (87) | (97)
1 to 2 years |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value |  |
2 to 3 years |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value |  |
3 to 4 years |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value |  |
4 to 5 years |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value |  |
>5 years |  |
Disclosure of detailed information about hedges [line items] |  |
Nominal value |  |

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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 [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 23B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_23B_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24A -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_d&doctype=Standard -URIDate 2023-03-23 + Details
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- Details
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