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Schedule of changes in deferred income and social contribution taxes (Details) - BRL (R$) R$ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income And Social Contribution Taxes |  |  |
Deferred tax liability (asset) at beginning of period | R$ 1,413 | R$ 1,660 | R$ 1,344
Effect allocated to other comprehensive income | (102) | 4 | 544
Effects allocated to net profit from continuing operations | 210 | (252) | (145)
Effects allocated to net profit from discontinuing operations (note 34) |  |  | (85)
Others | (2) | 1 | 2
Deferred taxes arising from shareholding reorganization | (16) |  |
Deferred tax liability (asset) at end of period | R$ 1,503 | R$ 1,413 | R$ 1,660

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