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Financial Assets at Amortized Cost-Securities - Summary of Reconciliation of Expected Loss to Financial Assets at Amortized Cost - Securities, Segregated by Stages (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | R$ 84 | R$ 93
Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | 0 | 1
Corporate debt securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | 48 | 56
Corporate debt securities [member] | Debentures [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | 44 | 44
Corporate debt securities [member] | Eurobonds and others [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | 1 | 9
Corporate debt securities [member] | Other [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | 3 | 3
Chile [member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | 1 |
Expected loss |  | 1
Korea [Member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | 4 |
Expected loss |  | 4
Spain [Member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | 3 |
Expected loss |  | 3
Mexico [Member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | 6 |
Expected loss |  | 6
Stage 1 [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (185) | (198)
Gains / (Losses) | 188 | (113)
Purchases | (147) | (172)
Settlements | 70 | 311
Transfer to Stage 2 |  | 21
Cure from Stage 3 |  | (34)
Expected loss | (74) | (185)
Stage 1 [member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (14) |
Gains / (Losses) | 37 | 8
Purchases | (36) | (34)
Settlements | 6 | 12
Expected loss | (7) | (14)
Stage 1 [member] | Corporate debt securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (127) | (146)
Gains / (Losses) | 144 | (129)
Purchases | (111) | (138)
Settlements | 64 | 299
Transfer to Stage 2 |  | 21
Cure from Stage 3 |  | (34)
Expected loss | (30) | (127)
Stage 1 [member] | Corporate debt securities [member] | Rural product note [Member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (23) | (9)
Gains / (Losses) | 39 | 15
Purchases | (24) | (44)
Settlements | 3 | 15
Expected loss | (5) | (23)
Stage 1 [member] | Corporate debt securities [member] | Bank deposit certificates [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | 1 |
Purchases | (10) |
Settlements | 8 |
Expected loss | (1) |
Stage 1 [member] | Corporate debt securities [member] | Real estate receivables certificates [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (8) | (2)
Gains / (Losses) | 6 | (10)
Purchases |  | (9)
Settlements | 1 | 13
Expected loss | (1) | (8)
Stage 1 [member] | Corporate debt securities [member] | Debentures [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (78) | (131)
Gains / (Losses) | 74 | (124)
Purchases | (52) | (60)
Settlements | 38 | 250
Transfer to Stage 2 |  | 21
Cure from Stage 3 |  | (34)
Expected loss | (18) | (78)
Stage 1 [member] | Corporate debt securities [member] | Eurobonds and others [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (1) | (1)
Gains / (Losses) | 8 | (6)
Purchases | (20) | (2)
Settlements | 11 | 8
Expected loss | (2) | (1)
Stage 1 [member] | Corporate debt securities [member] | Promissory and commercial notes [Member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (10) | (3)
Gains / (Losses) | 10 | (7)
Purchases | (5) | (10)
Settlements | 3 | 10
Expected loss | (2) | (10)
Stage 1 [member] | Corporate debt securities [member] | Other [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (7) |
Gains / (Losses) | 6 | 3
Purchases |  | (13)
Settlements |  | 3
Expected loss | (1) | (7)
Stage 1 [member] | Brazil [Member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (44) | (52)
Gains / (Losses) | 7 | 8
Expected loss | (37) | (44)
Stage 1 [member] | Chile [member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (1) |
Gains / (Losses) | 1 | (1)
Expected loss |  | (1)
Stage 1 [member] | Colombia [member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) | 4 |
Purchases | (6) | (2)
Settlements | 1 | 2
Expected loss | (1) |
Stage 1 [member] | Korea [Member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (4) |
Gains / (Losses) | 7 | 7
Purchases | (3) | (14)
Settlements |  | 3
Expected loss |  | (4)
Stage 1 [member] | Spain [Member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (3) |
Gains / (Losses) | 6 |
Purchases | (5) | (3)
Settlements | 1 |
Expected loss | (1) | (3)
Stage 1 [member] | Mexico [Member] | Government securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (6) |
Gains / (Losses) | 19 | 2
Purchases | (22) | (15)
Settlements | 4 | 7
Expected loss | (5) | (6)
Stage 2 [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (53) | (58)
Gains / (Losses) | 19 | (9)
Purchases | (20) | (67)
Settlements | 16 | 61
Transfer to Stage 1 |  | (21)
Transfer to Stage 3 |  | 54
Cure from Stage 3 |  | (13)
Expected loss | (38) | (53)
Stage 2 [member] | Debentures [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Transfer to Stage 1 | (21) |
Stage 2 [member] | Corporate debt securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (53) | (58)
Gains / (Losses) | 19 | (9)
Purchases | (20) | (67)
Settlements | 16 | 61
Transfer to Stage 1 |  | (21)
Transfer to Stage 3 |  | 54
Cure from Stage 3 |  | (13)
Expected loss | (38) | (53)
Stage 2 [member] | Corporate debt securities [member] | Rural product note [Member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (2) | (5)
Gains / (Losses) | 2 | (3)
Settlements |  | 5
Transfer to Stage 3 |  | 1
Expected loss |  | (2)
Stage 2 [member] | Corporate debt securities [member] | Real estate receivables certificates [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (4) |
Gains / (Losses) |  | (4)
Settlements | 4 |
Expected loss |  | (4)
Stage 2 [member] | Corporate debt securities [member] | Debentures [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (47) | (53)
Gains / (Losses) | 17 | (1)
Purchases | (20) | (67)
Settlements | 12 | 55
Transfer to Stage 3 |  | 53
Cure from Stage 3 |  | (13)
Expected loss | (38) | (47)
Stage 2 [member] | Corporate debt securities [member] | Eurobonds and others [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Gains / (Losses) |  | (1)
Settlements |  | 1
Stage 3 [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (2,827) | (2,397)
Gains / (Losses) | 610 | (1,278)
Purchases | (51) | (238)
Settlements | 432 | 1,093
Transfer to Stage 2 |  | (54)
Cure from Stage 1 |  | 34
Cure from Stage 2 |  | 13
Expected loss | (1,836) | (2,827)
Stage 3 [member] | Rural product note [Member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Transfer to Stage 2 |  | (1)
Stage 3 [member] | Debentures [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Transfer to Stage 2 |  | (53)
Cure from Stage 1 |  | 34
Cure from Stage 2 |  | 13
Stage 3 [member] | Corporate debt securities [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (2,827) | (2,397)
Gains / (Losses) | 610 | (1,278)
Purchases | (51) | (238)
Settlements | 432 | 1,093
Transfer to Stage 2 |  | (54)
Cure from Stage 1 |  | 34
Cure from Stage 2 |  | 13
Expected loss | (1,836) | (2,827)
Stage 3 [member] | Corporate debt securities [member] | Rural product note [Member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss |  | (33)
Gains / (Losses) | 6 | (7)
Purchases | (15) | (1)
Settlements |  | 42
Expected loss | (9) |
Stage 3 [member] | Corporate debt securities [member] | Debentures [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (2,827) | (2,348)
Gains / (Losses) | 604 | (1,287)
Purchases | (36) | (207)
Settlements | 432 | 1,021
Expected loss | R$ (1,827) | (2,827)
Stage 3 [member] | Corporate debt securities [member] | Other [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss |  | (16)
Gains / (Losses) |  | 16
Purchases |  | (30)
Settlements |  | R$ 30

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