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v3.22.1

Taxes - Summary of Deferred Tax Asset Balance and Respective Changes (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Deferred Tax Assets [Line Items] |  |
Beginning balance | R$ 61,623 | R$ 45,734
Realization / reversal | (24,750) | (13,822)
Increase | 18,447 | 29,711
Ending balance | 55,320 | 61,623
Beginning balance | 5,461 | 7,878
Realization / reversal | (1,609) | (3,810)
Increase | 917 | 1,393
Ending balance | 4,769 | 5,461
Cash flow hedges [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 758 | 1,187
Realization / reversal | (297) | (429)
Ending balance | 461 | 758
Beginning balance | 4 | 30
Realization / reversal | (3) | (26)
Increase | 0 |
Ending balance | 1 | 4
Reflected in income [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 60,248 | 43,380
Realization / reversal | (24,407) | (12,631)
Increase | 17,148 | 29,499
Ending balance | 52,989 | 60,248
Beginning balance | 4,853 | 6,610
Realization / reversal | (1,029) | (2,951)
Increase | 756 | 1,194
Ending balance | 4,580 | 4,853
Provision for expected loss [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 27,933 | 22,860
Realization / reversal | (6,274) | (3,885)
Increase | 6,769 | 8,958
Ending balance | 28,428 | 27,933
Related to income tax losses and social contribution tax carryforwards [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 5,528 | 2,585
Realization / reversal | (1,952) | (540)
Increase | 175 | 3,483
Ending balance | 3,751 | 5,528
Provision for profit sharing [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 1,903 | 2,162
Realization / reversal | (1,903) | (2,162)
Increase | 2,265 | 1,903
Ending balance | 2,265 | 1,903
Provision for devaluation of securities with permanent impairment [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 1,570 | 1,530
Realization / reversal | (1,013) | (877)
Increase | 441 | 917
Ending balance | 998 | 1,570
Provision [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 5,845 | 6,208
Realization / reversal | (1,923) | (2,064)
Increase | 1,926 | 1,701
Ending balance | 5,848 | 5,845
Civil lawsuits [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 1,331 | 1,413
Realization / reversal | (591) | (547)
Increase | 517 | 465
Ending balance | 1,257 | 1,331
Labor claims [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 3,056 | 3,251
Realization / reversal | (1,188) | (1,338)
Increase | 1,307 | 1,143
Ending balance | 3,175 | 3,056
Tax and social security [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 1,458 | 1,544
Realization / reversal | (144) | (179)
Increase | 102 | 93
Ending balance | 1,416 | 1,458
Legal liabilities [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 774 | 723
Increase | 84 | 58
Ending balance | 822 | 774
Legal liabilities [member] | Cash flow hedges [member] |  |
Deferred Tax Assets [Line Items] |  |
Realization / reversal | (36) | (7)
Adjustments of operations carried out on futures settlement market [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 52 | 84
Realization / reversal | (52) | (84)
Increase |  | 52
Ending balance |  | 52
Beginning balance | 452 | 1,330
Realization / reversal | (452) | (1,330)
Increase | 237 | 452
Ending balance | 237 | 452
Adjustment to fair value of financial assets at fair value through profit or loss [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 8,315 | 738
Realization / reversal | (8,315) | (738)
Increase | 2,726 | 8,315
Ending balance | 2,726 | 8,315
Beginning balance | 136 | 1,149
Realization / reversal | (136) | (1,149)
Increase | 71 | 136
Ending balance | 71 | 136
Provision related to health insurance operations [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 356 | 348
Increase | 6 | 8
Ending balance | 362 | 356
Other Items Reflected In Income [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 7,972 | 6,142
Realization / reversal | (2,939) | (2,274)
Increase | 2,756 | 4,104
Ending balance | 7,789 | 7,972
Beginning balance | 1,892 | 1,535
Realization / reversal | (227) | (171)
Increase | 208 | 528
Ending balance | 1,873 | 1,892
Reflected In Stockholder Equity [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 1,375 | 2,354
Realization / reversal | (343) | (1,191)
Increase | 1,299 | 212
Ending balance | 2,331 | 1,375
Beginning balance | 608 | 1,268
Realization / reversal | (580) | (859)
Increase | 161 | 199
Ending balance | 189 | 608
Adjustment to fair value of financial assets at fair value through other comprehensive income [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 60 | 766
Realization / reversal | (30) | (762)
Increase | 1,299 | 56
Ending balance | 1,329 | 60
Beginning balance | 601 | 1,228
Realization / reversal | (577) | (826)
Increase | 158 | 199
Ending balance | 182 | 601
Other [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 557 | 401
Realization / reversal | (16) |
Increase | 0 | 156
Ending balance | 541 | 557
Depreciation in excess - finance lease[Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 145 | 202
Realization / reversal | (8) | (57)
Ending balance | 137 | 145
Adjustment of escrow deposits and provisions [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 1,404 | 1,531
Realization / reversal | (21) | (133)
Increase | 39 | 6
Ending balance | 1,422 | 1,404
Post employment benefits [member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 180 | 282
Realization / reversal | 0 | (7)
Increase | 4 | 9
Ending balance | 6 | 180
Post employment benefits [member] | Cash flow hedges [member] |  |
Deferred Tax Assets [Line Items] |  |
Realization / reversal | (178) | (111)
Taxation of results abroad - capital gains [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 644 | 581
Realization / reversal | (7) | 0
Increase | 197 | 63
Ending balance | 834 | 644
Provision for pension plan benefits [Member] |  |
Deferred Tax Assets [Line Items] |  |
Beginning balance | 3 | 10
Increase | 3 |
Ending balance | R$ 6 | R$ 3

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