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Hedge accounting - Hedged item maturity (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of detailed information about hedged items [line items] |  |  |
Notional amount | R$ 46,671,688 | R$ 96,419,266 | R$ 20,967,990
Fair value hedges [member] |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional amount | 45,767,762 | 48,670,528 | 20,082,783
Hedges of net investment in foreign operations [member] |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional amount | 677,325 | 708,102 | 446,442
Cash flow hedges [member] |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional amount | R$ 226,601 | R$ 206,068 | R$ 438,765

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- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard -URIDate 2025-03-27 + Details
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