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20 Provisions (Details 2) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Summary of provisions [Line Items] |  |
Significant contingent liabilities | R$ 10,460,737 | R$ 9,433,489
Customer claims [member] |  |
Summary of provisions [Line Items] |  |
Significant contingent liabilities | 110,508 | 86,061
Supplier claims [member] |  |
Summary of provisions [Line Items] |  |
Significant contingent liabilities | 1,350,308 | 1,986,736
Other civil claims [member] |  |
Summary of provisions [Line Items] |  |
Significant contingent liabilities | 758,800 | 679,623
Tax claims [member] |  |
Summary of provisions [Line Items] |  |
Significant contingent liabilities | 1,253,636 | 1,184,811
Labor claims [member] |  |
Summary of provisions [Line Items] |  |
Significant contingent liabilities | 1,005,648 | 631,364
Environmental claims [member] |  |
Summary of provisions [Line Items] |  |
Significant contingent liabilities | R$ 5,981,837 | R$ 4,864,894

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