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Schedule of liabilities under post-employment benefits (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
IfrsStatementLineItems [Line Items] |  |  |
Post-employment benefits | R$ 1,295,174 | R$ 1,493,614 | R$ 1,194,936
Post-employment benefits | 1,295,174 | 1,493,614 |
Post-employment benefits, current | 68,836 | 69,231 |
Post-employment benefits, noncurrent | 1,226,338 | 1,424,383 |
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Post-employment benefits | 965 | 1,124 |
Healthcare Plans [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Post-employment benefits | R$ 1,294,209 | R$ 1,492,490 |

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