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Schedule of forecast benefit payments of the postemployment healthcare plans (Details) - Post Employment Healthcare Benefits [Member]
R$ in Thousands
Dec. 31, 2021
BRL (R$)
IfrsStatementLineItems [Line Items]  
Year 1 R$ 65,814
Year 2 63,130
Year 3 60,377
Year 4 57,534
Year 5 54,598
Next 5 years 227,586
Total forecast payments R$ 529,039