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Hedge accounting - Hedged item maturity (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | R$ 20,967,989 | R$ 18,563,230 | R$ 9,738,021
0-1 year |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 1,536,589 | 873,144 | 520,853
1-2 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 1,699,201 | 707,421 | 276,219
2-3 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 6,001,602 | 2,805,418 | 478,745
3-4 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 6,920,470 | 5,913,477 | 1,028,004
4-5 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 2,888,836 | 5,930,291 | 4,510,125
5-10 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 1,921,291 | 2,333,479 | 2,924,075
Hedge of fair value |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 20,082,782 | 17,887,369 | 9,297,999
Hedge of fair value | 0-1 year |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 696,906 | 229,368 | 136,636
Hedge of fair value | 1-2 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 1,653,677 | 707,421 | 276,219
Hedge of fair value | 2-3 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 6,001,602 | 2,773,333 | 478,745
Hedge of fair value | 3-4 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 6,920,470 | 5,913,477 | 972,199
Hedge of fair value | 4-5 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 2,888,836 | 5,930,291 | 4,510,125
Hedge of fair value | 5-10 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 1,921,291 | 2,333,479 | 2,924,075
Hedge of net investment in foreign operations |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 446,442 | 414,043 | 440,022
Hedge of net investment in foreign operations | 0-1 year |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 400,918 | 381,958 | 384,217
Hedge of net investment in foreign operations | 1-2 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 45,524 | 0 | 0
Hedge of net investment in foreign operations | 2-3 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 32,085 | 0
Hedge of net investment in foreign operations | 3-4 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 0 | 55,805
Hedge of net investment in foreign operations | 4-5 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 0 | 0
Hedge of net investment in foreign operations | 5-10 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 0 | 0
Hedge of cash flow |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 438,765 | 261,818 | R$ 0
Hedge of cash flow | 0-1 year |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 438,765 | 261,818 |
Hedge of cash flow | 1-2 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 0 |
Hedge of cash flow | 2-3 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 0 |
Hedge of cash flow | 3-4 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 0 |
Hedge of cash flow | 4-5 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | 0 | 0 |
Hedge of cash flow | 5-10 years |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |
Notional value | R$ 0 | R$ 0 |

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