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v3.22.1

Schedule of estimated balance of deferred tax asset (Details) - BRL (R$) R$ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | R$ 4,255 | R$ 4,323 | R$ 4,028
Not later than one year [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | 717 |  |
Later Than One Years And Not Later Than Two Years [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | 583 |  |
Later than two years and not later than three years [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | 662 |  |
Later than three years and not later than four years [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | 507 |  |
Later than four years and not later than five years [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | 481 |  |
Later Than Five Years And Not Later Than Eight Years [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | 845 |  |
Later Than Eight Years And Not Later Than Ten Years [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Deferred tax assets future taxable profits | R$ 460 |  |

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