Intangible assets - Other intangible assets (Details) - BRL (R$)
R$ in Thousands |
12 Months Ended |
Dec. 31, 2025 |
Dec. 31, 2024 |
| Cost [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
R$ 11,861,968
|
R$ 10,656,760
|
| Additions |
2,221,363
|
1,689,388
|
| Write-off |
(4,327,976)
|
(484,180)
|
| Balance at ending |
9,755,355
|
11,861,968
|
| Cost [Member] | Computer software [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
11,564,209
|
9,969,742
|
| Additions |
1,982,496
|
1,654,226
|
| Write-off |
(3,969,781)
|
(59,759)
|
| Balance at ending |
9,576,924
|
11,564,209
|
| Cost [Member] | Other intangible assets [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
297,759
|
687,018
|
| Additions |
238,867
|
35,162
|
| Write-off |
(358,195)
|
(424,421)
|
| Balance at ending |
178,431
|
297,759
|
| Accumulated Amortization [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
(6,728,334)
|
(5,982,997)
|
| Additions |
(1,538,749)
|
(1,144,740)
|
| Write-off |
3,894,037
|
399,403
|
| Balance at ending |
(4,373,046)
|
(6,728,334)
|
| Accumulated Amortization [Member] | Computer software [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
(6,567,658)
|
(5,499,334)
|
| Additions |
(1,442,315)
|
(1,079,186)
|
| Write-off |
3,710,597
|
10,862
|
| Balance at ending |
(4,299,376)
|
(6,567,658)
|
| Accumulated Amortization [Member] | Other intangible assets [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
(160,676)
|
(483,663)
|
| Additions |
(96,434)
|
(65,554)
|
| Write-off |
183,440
|
388,541
|
| Balance at ending |
(73,670)
|
(160,676)
|
| Losses From Non Recovery Impairment I T [Member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
(199,715)
|
(150,818)
|
| Write-off |
266,738
|
|
| Balance at ending |
|
(199,715)
|
| Impact on net profit |
(67,023)
|
(48,897)
|
| Losses From Non Recovery Impairment I T [Member] | Computer software [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
(168,032)
|
(119,135)
|
| Write-off |
214,643
|
|
| Balance at ending |
|
(168,032)
|
| Impact on net profit |
(46,611)
|
(48,897)
|
| Losses From Non Recovery Impairment I T [Member] | Other intangible assets [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance at beginning |
(31,683)
|
(31,683)
|
| Write-off |
52,095
|
|
| Balance at ending |
|
(31,683)
|
| Impact on net profit |
(20,412)
|
|
| Gross carrying amount [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance carrying amount |
5,382,309
|
4,933,919
|
| Gross carrying amount [member] | Computer software [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance carrying amount |
5,277,548
|
4,828,519
|
| Gross carrying amount [member] | Other intangible assets [member] |
|
|
| IfrsStatementLineItems [Line Items] |
|
|
| Balance carrying amount |
R$ 104,761
|
R$ 105,400
|