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v3.19.1

Risk and Capital Management - Summary of Composition of the Referential Equity (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | ---
Disclosure of regulatory capital [Line Items] |  |  |  |  |
Stockholders' equity attributable to controlling interests | R$ 136,782 | R$ 131,378 | R$ 120,095 |  |
Non-controllinginterests | 13,684 | 12,978 | 12,289 |  |
Total stockholders' equity | 150,466 | 144,356 | R$ 132,384 | R$ 132,384 | R$ 113,597
Common Equity Tier I | 123,358 | 122,396 |  |  |
Additional Tier I Capital | 7,796 | 57 |  |  |
Tier I (Common Equity Tier I + Additional Tier I Capital) | 131,154 | 122,453 |  |  |
Tier II | 15,874 | 19,799 |  |  |
Referential Equity (Tier I + Tier II) | 147,028 | 142,252 |  |  |
Referential equity (tier I + tier II) [member] |  |  |  |  |
Disclosure of regulatory capital [Line Items] |  |  |  |  |
Stockholders' equity attributable to controlling interests | 131,757 | 126,924 |  |  |
Non-controllinginterests | 12,276 | 11,942 |  |  |
Change in interest in subsidiaries in a capital transaction | 98 | 1,482 |  |  |
Total stockholders' equity | 144,131 | 140,348 |  |  |
Common Equity Tier I Prudential Adjustments | (20,773) | (17,952) |  |  |
Common Equity Tier I | 123,358 | 122,396 |  |  |
Instruments Eligible to Comprise Additional Tier I | 7,701 |  |  |  |
Additional Tier I Prudential Adjustments | 95 | 57 |  |  |
Additional Tier I Capital | 7,796 | 57 |  |  |
Tier I (Common Equity Tier I + Additional Tier I Capital) | 131,154 | 122,453 |  |  |
Instruments Eligible to Comprise Tier II | 15,778 | 19,723 |  |  |
Tier II Prudential Adjustments | 96 | 76 |  |  |
Tier II | 15,874 | 19,799 |  |  |
Referential Equity (Tier I + Tier II) | R$ 147,028 | R$ 142,252 |  |  |

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