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Fair value (Details 2) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Derivatives assets, beginning balance | R$ 55,251 |
Derivatives assets, ending balance | 92,439 | R$ 55,251
Level 3 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 2,118 | 339
Total gains or losses (realized / unrealized),Recognized in the result | 286 | (5)
Purchases | 1,209 | 920
Settlements | (585) | (300)
Transfers in and / or out of Level | (1,088) | 1,164
Fair value, Ending balance | 1,940 | 2,118
Total Gains or Losses (Unrealized) | (994) | (1,009)
Fair value assets, beginning balance | 253 | 58
Total gains or losses (realized / unrealized),Recognized in the result | 12 | (19)
Total gains or losses (realized / unrealized),Recognized in the result | 6 | 153
Purchases | 504 | 51
Settlements | (372) | (8)
Transfers in and / or out of Level | (185) | 18
Fair value assets, ending balance | 218 | 253
Derivatives assets, beginning balance | 262 | 671
Total gains or losses (realized / unrealized), Recognized in the result | 176 | 80
Purchases | 235 | 157
Settlements | (216) | (104)
Transfers in and / or out of Level | (85) | (542)
Derivatives assets, ending balance | 372 | 262
Derivatives assets, Total gains or losses (unrealized) | 270 | 244
Derivatives liabilities, beginning balance | (389) | (569)
Total gains or losses (realized / unrealized), Recognized in the result | (215) | (74)
Purchases | (306) | (387)
Settlements | 239 | 189
Transfers in and / or out of Level | 496 | 452
Derivatives liabilities, ending balance | (175) | (389)
Derivatives liability, Total gains or losses (unrealized) | 13 | 273
Level 3 of fair value hierarchy [member] | Swap contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivatives assets, beginning balance | 236 | 631
Total gains or losses (realized / unrealized), Recognized in the result | 164 | 108
Purchases | 168 | 133
Settlements | (169) | (94)
Transfers in and / or out of Level | (77) | (542)
Derivatives assets, ending balance | 322 | 236
Derivatives assets, Total gains or losses (unrealized) | 271 | 240
Derivatives liabilities, beginning balance | (372) | (561)
Total gains or losses (realized / unrealized), Recognized in the result | (233) | (70)
Purchases | (252) | (369)
Settlements | 216 | 176
Transfers in and / or out of Level | 489 | 452
Derivatives liabilities, ending balance | (152) | (372)
Derivatives liability, Total gains or losses (unrealized) | 6 | 274
Level 3 of fair value hierarchy [member] | Currency Options Contract [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivatives assets, beginning balance | 6 | 34
Total gains or losses (realized / unrealized), Recognized in the result | 13 | (32)
Purchases | 67 | 14
Settlements | (47) | (10)
Transfers in and / or out of Level | (8) |
Derivatives assets, ending balance | 31 | 6
Derivatives assets, Total gains or losses (unrealized) | (2) | 1
Derivatives liabilities, beginning balance | (1) | (2)
Total gains or losses (realized / unrealized), Recognized in the result | 17 | (3)
Purchases | (54) | (9)
Settlements | 23 | 13
Transfers in and / or out of Level | 7 |
Derivatives liabilities, ending balance | (8) | (1)
Derivatives liability, Total gains or losses (unrealized) | 7 | (1)
Level 3 of fair value hierarchy [member] | Currency Forward Contract [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivatives assets, beginning balance | 19 | 6
Total gains or losses (realized / unrealized), Recognized in the result | (1) | 3
Purchases |  | 10
Derivatives assets, ending balance | 18 | 19
Derivatives assets, Total gains or losses (unrealized) |  | 3
Derivatives liabilities, beginning balance | (16) | (6)
Total gains or losses (realized / unrealized), Recognized in the result | 1 | (1)
Purchases |  | (9)
Derivatives liabilities, ending balance | (15) | (16)
Level 3 of fair value hierarchy [member] | Credit Derivatives [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivatives assets, beginning balance | 1 |
Derivatives assets, ending balance | 1 | 1
Derivatives assets, Total gains or losses (unrealized) | 1 |
Level 3 of fair value hierarchy [member] | Currency Credit Derivatives [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Derivatives assets, beginning balance | 1 |
Total gains or losses (realized / unrealized), Recognized in the result |  | 1
Derivatives assets, ending balance |  | 1
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 2,118 | 339
Total gains or losses (realized / unrealized),Recognized in the result | 286 | (5)
Purchases | 1,209 | 920
Settlements | (585) | (300)
Transfers in and / or out of Level | (1,088) | 1,164
Fair value, Ending balance | 1,940 | 2,118
Total Gains or Losses (Unrealized) | (994) | (1,009)
Fair value assets, beginning balance | 253 | 58
Total gains or losses (realized / unrealized),Recognized in the result | 12 | (19)
Total gains or losses (realized / unrealized),Recognized in the result | 6 | 153
Purchases | 504 | 51
Settlements | (372) | (8)
Transfers in and / or out of Level | (185) | 18
Fair value assets, ending balance | 218 | 253
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Shares [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 71 | 86
Total gains or losses (realized / unrealized),Recognized in the result | 36 | (14)
Purchases | 3 | 9
Settlements | (4) | (10)
Fair value, Ending balance | 106 | 71
Total Gains or Losses (Unrealized) | (98) | (100)
Fair value assets, beginning balance | 193 | 45
Total gains or losses (realized / unrealized),Recognized in the result |  | (3)
Total gains or losses (realized / unrealized),Recognized in the result |  | 151
Settlements | (193) |
Fair value assets, ending balance |  | 193
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Real Estate Receivables Certificates [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 126 | 151
Total gains or losses (realized / unrealized),Recognized in the result | (27) | (38)
Purchases | 83 | 2
Settlements | (95) |
Transfers in and / or out of Level | 13 | 11
Fair value, Ending balance | 100 | 126
Total Gains or Losses (Unrealized) | (78) | (64)
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Debentures [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 1,895 | 84
Total gains or losses (realized / unrealized),Recognized in the result | 306 | (36)
Purchases | 950 | 740
Settlements | (259) | (67)
Transfers in and / or out of Level | (1,158) | 1,174
Fair value, Ending balance | 1,734 | 1,895
Total Gains or Losses (Unrealized) | (818) | (845)
Total gains or losses (realized / unrealized),Recognized in the result | 7 |
Total gains or losses (realized / unrealized),Recognized in the result | (1) | (1)
Purchases | 216 | 35
Settlements | (144) |
Transfers in and / or out of Level | 140 | (34)
Fair value assets, ending balance | 218 |
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Promissory Note [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 17 |
Total gains or losses (realized / unrealized),Recognized in the result |  | (3)
Purchases |  | 20
Transfers in and / or out of Level | (17) |
Fair value, Ending balance |  | 17
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Eurobonds And Others [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 5 | 4
Total gains or losses (realized / unrealized),Recognized in the result | (41) | 84
Purchases | 132 | 137
Settlements | (87) | (220)
Transfers in and / or out of Level | (9) |
Fair value, Ending balance |  | 5
Fair value assets, beginning balance | 60 |
Total gains or losses (realized / unrealized),Recognized in the result | 5 | (3)
Total gains or losses (realized / unrealized),Recognized in the result | 7 | 3
Purchases | 288 | 16
Settlements | (35) | (8)
Transfers in and / or out of Level | (325) | 52
Fair value assets, ending balance |  | 60
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Financial Credit Bills [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance | 4 | 7
Total gains or losses (realized / unrealized),Recognized in the result |  | (3)
Purchases |  | 10
Settlements | (4) | (3)
Transfers in and / or out of Level |  | (7)
Fair value, Ending balance |  | 4
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Other Securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total gains or losses (realized / unrealized),Recognized in the result | 12 |
Settlements | (136) |
Transfers in and / or out of Level | 83 |
Purchases | R$ 41 |
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Rural Product Note [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance |  | 7
Total gains or losses (realized / unrealized),Recognized in the result |  | 5
Purchases |  | 2
Transfers in and / or out of Level |  | (14)
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Bank Deposit Certificates [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value assets, beginning balance |  | 13
Total gains or losses (realized / unrealized),Recognized in the result |  | R$ (13)

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