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Fair value of financial instruments (Details 2) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
IfrsStatementLineItems [Line Items] |  |
At Fair Value Through Profit or Loss | R$ 464,682 | R$ 434,169
Fair value, Beginning balance | 69,045 |
Fair value, Ending balance | 78,208 | 69,045
Fair value, Beginning balance | (63,204) |
Fair value, Ending balance | (76,861) | (63,204)
Fair value, Ending balance | (76,861) | (63,204)
Fair value, Ending balance | 464,682 | 434,169
Swap contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | (34,646) |
Fair value, Ending balance | (39,068) | (34,646)
Fair value, Ending balance | (39,068) | (34,646)
Forward contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | (762) |
Fair value, Ending balance | (65) | (762)
Fair value, Ending balance | (65) | (762)
Other Derivative Financial Instruments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | (5,249) |
Fair value, Ending balance | (7,846) | (5,249)
Fair value, Ending balance | (7,846) | (5,249)
Level 3 of fair value hierarchy [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 1,563 |
Total gains or losses (realized / unrealized),Recognized in the result | 46 | (505)
Purchases | 143 | 1,993
Settlements | (49) | (865)
Transfers in and / or out of Level | (1,324) | (1,028)
At Fair Value Through Profit or Loss | 379 | 1,563
Total Gains or Losses (Unrealized) | (98) | (434)
Purchases |  | 47
Total gains or losses (realized / unrealized), Recognized in the result |  | (2)
Transfers in and / or out of Level |  | 13
Fair value, Ending balance | 58 |
Fair value, Beginning balance | 152 | 105
Total gains or losses (realized / unrealized), Recognized in the result | 178 | 46
Total gains or losses (realized / unrealized), Recognized in other comprehensive income | 64 |
Purchases | 234 | 327
Settlements | (552) | (284)
Transfers in and / or out of Level | 595 | (42)
Fair value, Ending balance | 671 | 152
Total Gains or Losses (Unrealized) | 588 | 56
Fair value, Beginning balance | (125) | (110)
Total gains or losses (realized / unrealized), Recognized in the result | 48 | (72)
Total gains or losses (realized / unrealized), Recognized in other comprehensive income | (132) |
Purchases | (85) | (233)
Settlements | 38 | 148
Transfers in and / or out of Level | (313) | (2)
Fair value, Ending balance | (569) | (125)
Total Gains or Losses (Unrealized) | (349) | (24)
Total gains or losses (realized / unrealized), Recognized in the result | (48) | 72
Fair value, Ending balance | (569) | (125)
Fair value, Beginning balance |  | 1,968
Fair value, Ending balance | 379 | 1,563
Level 3 of fair value hierarchy [member] | Swap contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 90 | 93
Total gains or losses (realized / unrealized), Recognized in the result | 151 | 26
Total gains or losses (realized / unrealized), Recognized in other comprehensive income | 64 |
Purchases |  | 56
Settlements | (73) | (43)
Transfers in and / or out of Level | 399 | (42)
Fair value, Ending balance | 631 | 90
Total Gains or Losses (Unrealized) | 608 | 90
Fair value, Beginning balance | (111) | (109)
Total gains or losses (realized / unrealized), Recognized in the result | 25 | (8)
Total gains or losses (realized / unrealized), Recognized in other comprehensive income | (132) |
Purchases |  | (30)
Settlements | 21 | 22
Transfers in and / or out of Level | (314) | (2)
Fair value, Ending balance | (561) | (111)
Total Gains or Losses (Unrealized) | (350) | (46)
Total gains or losses (realized / unrealized), Recognized in the result | (25) | 8
Fair value, Ending balance | (561) | (111)
Level 3 of fair value hierarchy [member] | Currency Options Contract [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 62 | 12
Total gains or losses (realized / unrealized), Recognized in the result | 27 | 20
Purchases | 228 | 271
Settlements | (479) | (241)
Transfers in and / or out of Level | 196 |
Fair value, Ending balance | 34 | 62
Total Gains or Losses (Unrealized) | (20) | (34)
Fair value, Beginning balance | (14) | (1)
Total gains or losses (realized / unrealized), Recognized in the result | (73) | (64)
Purchases | (79) | (203)
Settlements | 17 | 126
Transfers in and / or out of Level | 1 |
Fair value, Ending balance | (2) | (14)
Total Gains or Losses (Unrealized) | 1 | 22
Total gains or losses (realized / unrealized), Recognized in the result | 73 | 64
Fair value, Ending balance | (2) | (14)
Level 3 of fair value hierarchy [member] | Forward contract [member] |  |
IfrsStatementLineItems [Line Items] |  |
Purchases | 6 |
Fair value, Ending balance | 6 |
Level 3 of fair value hierarchy [member] | Other Derivative Financial Instruments [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Purchases | (6) |
Fair value, Ending balance | (6) |
Fair value, Ending balance | (6) |
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 1,563 |
Total gains or losses (realized / unrealized),Recognized in the result | 21 | (505)
Purchases | 128 | 47
Settlements | (49) | (865)
Transfers in and / or out of Level | (1,324) | (1,028)
At Fair Value Through Profit or Loss | 339 | 1,563
Total Gains or Losses (Unrealized) | (138) | (434)
Total gains or losses (realized / unrealized), Recognized in the result |  | (2)
Fair value, Ending balance | 58 |
Fair value, Beginning balance |  | 1,968
Fair value, Ending balance | 339 | 1,563
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Shares [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance |  |
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Real Estate Receivables Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 3 |
Total gains or losses (realized / unrealized),Recognized in the result | (36) | (167)
Purchases | 2 | 1,039
Settlements | (2) | (616)
Transfers in and / or out of Level | 184 | (801)
At Fair Value Through Profit or Loss | 151 | 3
Total Gains or Losses (Unrealized) | (60) |
Fair value, Beginning balance |  | 548
Fair value, Ending balance | 151 | 3
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Debentures [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 1,478 |
Total gains or losses (realized / unrealized),Recognized in the result | 109 | (313)
Purchases | 96 | 855
Settlements |  | (211)
Transfers in and / or out of Level | (1,599) | (203)
At Fair Value Through Profit or Loss | 84 | 1,478
Total Gains or Losses (Unrealized) | (7) | (432)
Fair value, Beginning balance |  | 1,350
Fair value, Ending balance | 84 | 1,478
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Rural Product Note [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 61 | 64
Total gains or losses (realized / unrealized),Recognized in the result | 3 | (15)
Purchases |  | 62
At Fair Value Through Profit or Loss | 7 | 61
Total Gains or Losses (Unrealized) | (9) |
Settlements | (1) | (32)
Transfers in and / or out of Level | (56) | (18)
Fair value, Ending balance | 7 | 61
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Eurobonds and others [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 8 |
Total gains or losses (realized / unrealized),Recognized in the result | (1) | (9)
Purchases | 11 | 23
Settlements | (14) | (6)
At Fair Value Through Profit or Loss | 4 | 8
Total Gains or Losses (Unrealized) |  | (2)
Fair value, Ending balance | 4 | 8
Level 3 of fair value hierarchy [member] | Corporate Securities [Member] | Financial credit bills [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Beginning balance | 13 | 6
Total gains or losses (realized / unrealized),Recognized in the result |  | (1)
Purchases | 19 | 14
Settlements | (32) |
Transfers in and / or out of Level | 7 |
At Fair Value Through Profit or Loss | 7 | 13
Transfers in and / or out of Level |  | (6)
Fair value, Ending balance | 7 | 13
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 |  | 25
At Fair Value Through Profit or Loss | 40 |
Total Gains or Losses (Unrealized) | 40 |
Purchases |  | 15
Fair value, Ending balance | 40 |
Level 3 of fair value hierarchy [member] | Shares [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Total gains or losses (realized / unrealized),Recognized in the result | (54) |
Purchases |  | 47
Transfers in and / or out of Level | 140 |
At Fair Value Through Profit or Loss | 86 |
Total Gains or Losses (Unrealized) | (62) |
Total gains or losses (realized / unrealized), Recognized in the result |  | (2)
Fair value, Ending balance | 86 |
Level 3 of fair value hierarchy [member] | Corporate Securitie [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Purchases |  | 1,993
Transfers in and / or out of Level |  | R$ 13
Level 3 of fair value hierarchy [member] | Corporate Securities Shares [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Ending balance | 45 |
Level 3 of fair value hierarchy [member] | Bank Deposit Certificates [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Fair value, Ending balance | R$ 13 |

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