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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, 2019 | Dec. 31, 2018
Stage 1 [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | R$ (223) | R$ (76)
Gains / (Losses) | 36 | (82)
Purchases | (38) | (28)
Settlements | 48 | 14
Transfer to Stage 2 | 74 |
Cure from Stage 2 | (75) | (51)
Cure from Stage 3 | (20) |
Expected loss | (198) | (223)
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 | (219) | (73)
Gains / (Losses) | 24 | (83)
Purchases | (35) | (26)
Settlements | 46 | 14
Transfer to Stage 2 | 74 |
Cure from Stage 2 | (16) | (51)
Cure from Stage 3 | (20) |
Expected loss | (146) | (219)
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 | (7) | (9)
Gains / (Losses) | 4 | 5
Purchases | (7) | (7)
Settlements | 1 | 4
Expected loss | (9) | (7)
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 | (2) | (9)
Gains / (Losses) |  | 5
Purchases | (4) |
Settlements | 23 | 2
Cure from Stage 3 | (19) |
Expected loss | (2) | (2)
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 | (206) | (52)
Gains / (Losses) | 19 | (93)
Purchases | (21) | (18)
Settlements | 20 | 8
Transfer to Stage 2 | 74 |
Cure from Stage 2 | (16) | (51)
Cure from Stage 3 | (1) |
Expected loss | (131) | (206)
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 | (2) | (2)
Settlements | 1 |
Expected loss | (1) | (2)
Stage 1 [member] | Corporate debt securities [member] | Promissory notes [Member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (2) | (1)
Gains / (Losses) | 1 |
Purchases | (3) | (1)
Settlements | 1 |
Expected loss | (3) | (2)
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] |  |
Expected loss | (4) | (3)
Gains / (Losses) | 5 | 1
Purchases | (3) | (2)
Settlements | 2 |
Expected loss |  | (4)
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] |  |
Gains / (Losses) | 7 |
Cure from Stage 2 | (59) |
Expected loss | (52) |
Stage 2 [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (824) | (368)
Gains / (Losses) | 82 | (26)
Purchases | (2) | (561)
Settlements | 66 | 6
Transfer to Stage 1 | 75 | 51
Transfer to Stage 3 | 619 | 74
Cure from Stage 1 | (74) |
Expected loss | (58) | (824)
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 | (765) | (303)
Gains / (Losses) | 82 | (32)
Purchases | (2) | (561)
Settlements | 66 | 6
Transfer to Stage 1 | 16 | 51
Transfer to Stage 3 | 619 | 74
Cure from Stage 1 | (74) |
Expected loss | (58) | (765)
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] |  |
Gains / (Losses) | (8) | 11
Purchases | (2) | (22)
Transfer to Stage 3 | 5 | 11
Expected loss | (5) |
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 |  | (5)
Gains / (Losses) |  | (1)
Transfer to Stage 3 |  | 6
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 | (765) | (284)
Gains / (Losses) | 90 | (30)
Purchases |  | (539)
Settlements | 66 | 1
Transfer to Stage 1 | 16 | 51
Transfer to Stage 3 | 614 | 36
Cure from Stage 1 | (74) |
Expected loss | (53) | (765)
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) |  | (5)
Settlements |  | 5
Stage 2 [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 |  | (14)
Gains / (Losses) |  | (7)
Transfer to Stage 3 |  | 21
Stage 2 [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 | (59) | (65)
Gains / (Losses) |  | 6
Transfer to Stage 1 | 59 |
Expected loss |  | (59)
Stage 3 [member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (2,599) | (4,738)
Gains / (Losses) | (35) | 742
Purchases | (193) | (594)
Settlements | 1,029 | 2,065
Transfer to Stage 1 | 20 |
Cure from Stage 2 | (619) | (74)
Expected loss | (2,397) | (2,599)
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 | (2,599) | (4,738)
Gains / (Losses) | (35) | 742
Purchases | (193) | (594)
Settlements | 1,029 | 2,065
Transfer to Stage 1 | 20 |
Cure from Stage 2 | (619) | (74)
Expected loss | (2,397) | (2,599)
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 | (173) | (148)
Gains / (Losses) | (3) | (105)
Purchases | (50) | (36)
Settlements | 198 | 127
Cure from Stage 2 | (5) | (11)
Expected loss | (33) | (173)
Stage 3 [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 | (361) | (2,046)
Gains / (Losses) | 16 | 447
Settlements | 326 | 1,244
Transfer to Stage 1 | 19 |
Cure from Stage 2 |  | (6)
Expected loss |  | (361)
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 | (2,037) | (2,522)
Gains / (Losses) | (48) | 401
Purchases | (127) | (558)
Settlements | 477 | 678
Transfer to Stage 1 | 1 |
Cure from Stage 2 | (614) | (36)
Expected loss | (2,348) | (2,037)
Stage 3 [member] | Corporate debt securities [member] | Promissory notes [Member] |  |
Disclosure of maturity analysis for derivative financial assets designated at fair value through profit or loss [Line Items] |  |
Expected loss | (11) | (22)
Gains / (Losses) |  | (5)
Settlements | 11 | 16
Expected loss |  | (11)
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 | (17) |
Gains / (Losses) |  | 4
Purchases | (16) |
Settlements | 17 |
Cure from Stage 2 |  | (21)
Expected loss | R$ (16) | R$ (17)

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