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Financial assets at fair value through profit or loss and designated at fair value through profit or loss - Securities (Tables) | 12 Months Ended
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Dec. 31, 2018
Text block1 [abstract] |
Summary of Financial Assets at Fair Value Through Profit or Loss | a) Financial assets at fair value through profit or loss are presented in the following table:
|  | 12/31/2018 |  |  | 12/31/2017 |
| Gross carrying amount |  |  | Adjustments to Fair Value (in Income) |  |  | Fair value |  |  | Gross carrying amount |  |  | Adjustments to Fair Value (in Income) |  |  | Fair value |
Investment funds |  |  | 5,253 |  |  |  | (927 | ) |  |  | 4,326 |  |  |  | 4,135 |  |  |  | (622 | ) |  |  | 3,513 |
Brazilian government securities (1a) |  |  | 215,956 |  |  |  | 1,102 |  |  |  | 217,058 |  |  |  | 207,418 |  |  |  | 426 |  |  |  | 207,844 |
Government securities – abroad (1b) |  |  | 2,070 |  |  |  | 9 |  |  |  | 2,079 |  |  |  | 3,917 |  |  |  | 32 |  |  |  | 3,949 |
Argentina |  |  | 1,121 |  |  |  | 8 |  |  |  | 1,129 |  |  |  | 1,446 |  |  |  | 20 |  |  |  | 1,466 |
Chile |  |  | 301 |  |  |  | 1 |  |  |  | 302 |  |  |  | 57 |  |  |  | — |  |  |  | 57 |
Colombia |  |  | 207 |  |  |  | 0 |  |  |  | 207 |  |  |  | 2,080 |  |  |  | 12 |  |  |  | 2,092 |
United States |  |  | 117 |  |  |  | 0 |  |  |  | 117 |  |  |  | 100 |  |  |  | — |  |  |  | 100 |
Mexico |  |  | 120 |  |  |  | 0 |  |  |  | 120 |  |  |  | 5 |  |  |  | — |  |  |  | 5 |
Paraguay |  |  | 1 |  |  |  | 0 |  |  |  | 1 |  |  |  | 3 |  |  |  | — |  |  |  | 3 |
Uruguay |  |  | 84 |  |  |  | 0 |  |  |  | 84 |  |  |  | 193 |  |  |  | — |  |  |  | 193 |
Italy |  |  | 115 |  |  |  | 0 |  |  |  | 115 |  |  |  | — |  |  |  | — |  |  |  | — |
Other |  |  | 4 |  |  |  | 0 |  |  |  | 4 |  |  |  | 33 |  |  |  | — |  |  |  | 33 |
Corporate securities (1c) |  |  | 38,953 |  |  |  | (505 | ) |  |  | 38,448 |  |  |  | 33,816 |  |  |  | (175 | ) |  |  | 33,641 |
Shares |  |  | 9,778 |  |  |  | (332 | ) |  |  | 9,446 |  |  |  | 6,080 |  |  |  | (121 | ) |  |  | 5,959 |
Bank deposit certificates |  |  | 969 |  |  |  | 0 |  |  |  | 969 |  |  |  | 335 |  |  |  | — |  |  |  | 335 |
Securitized real estate loans |  |  | 1,391 |  |  |  | 20 |  |  |  | 1,411 |  |  |  | 1,779 |  |  |  | 16 |  |  |  | 1,795 |
Debentures |  |  | 5,147 |  |  |  | (187 | ) |  |  | 4,960 |  |  |  | 3,290 |  |  |  | (74 | ) |  |  | 3,216 |
Eurobonds and other |  |  | 1,403 |  |  |  | (7 | ) |  |  | 1,396 |  |  |  | 684 |  |  |  | 4 |  |  |  | 688 |
Financial credit bills |  |  | 19,724 |  |  |  | 0 |  |  |  | 19,724 |  |  |  | 21,170 |  |  |  | — |  |  |  | 21,170 |
Promissory notes |  |  | 435 |  |  |  | 0 |  |  |  | 435 |  |  |  | 391 |  |  |  | — |  |  |  | 391 |
Other |  |  | 106 |  |  |  | 1 |  |  |  | 107 |  |  |  | 87 |  |  |  | — |  |  |  | 87 |
Total |  |  | 262,232 |  |  |  | (321 | ) |  |  | 261,911 |  |  |  | 249,286 |  |  |  | (339 | ) |  |  | 248,947 |
1) | Financial assets at fair value through profit or loss – Securities pledged as Guarantee of Funding of Financial Institutions and Clients were: a) R$ 30,114 (R$ 30,325 at 12/31/2017), b) R$ 131 (R$ 46 at 12/31/2017) and c) (R$ 28 at 12/31/2017), totaling R$ 30,245 (R$ 30,399 at 12/31/2017).
Summary of Cost and Fair Value of Financial Assets Held for Trading by Maturity | The cost and fair value of Financial Assets at Fair Value Through Profit or Loss are as follows:
|  | 12/31/2018 |  |  | 12/31/2017 |
|  | Gross carrying amount |  |  | Fair value |  |  | Gross carrying amount |  |  | Fair value |
Current |  |  | 53,382 |  |  |  | 52,096 |  |  |  | 50,174 |  |  |  | 49,512 |
Non-stated maturity |  |  | 15,031 |  |  |  | 13,772 |  |  |  | 10,214 |  |  |  | 9,469 |
Up to one year |  |  | 38,351 |  |  |  | 38,324 |  |  |  | 39,960 |  |  |  | 40,043 |
Non-current |  |  | 208,850 |  |  |  | 209,815 |  |  |  | 199,112 |  |  |  | 199,435 |
From one to five years |  |  | 153,256 |  |  |  | 153,701 |  |  |  | 147,700 |  |  |  | 147,805 |
From five to ten years |  |  | 44,258 |  |  |  | 44,620 |  |  |  | 41,279 |  |  |  | 41,499 |
After ten years |  |  | 11,336 |  |  |  | 11,494 |  |  |  | 10,133 |  |  |  | 10,131 |
Total |  |  | 262,232 |  |  |  | 261,911 |  |  |  | 249,286 |  |  |  | 248,947 |
Summary of Financial Assets Designated at Fair Value Through Profit or Loss | b) Financial assets designated at fair value through profit or loss are presented in the following table:
|  | 12/31/2018 |
| Gross carrying amount |  |  | Adjustments to Fair Value (in Income) |  |  | Fair value |
Brazilian external debt bonds |  |  | 1,232 |  |  |  | 37 |  |  |  | 1,269 |
Total |  |  | 1,232 |  |  |  | 37 |  |  |  | 1,269 |
|  | 12/31/2017 |
| Gross carrying amount |  |  | Adjustments to Fair Value (in Income) |  |  | Fair value |
Brazilian external debt bonds |  |  | 1,670 |  |  |  | 76 |  |  |  | 1,746 |
Total |  |  | 1,670 |  |  |  | 76 |  |  |  | 1,746 |
Summary of Cost and Fair Value by Maturity of Financial Assets Designated as Fair Value Through Profit or Loss | The cost and fair value by maturity of financial assets designated as fair value through profit or loss were as follows:
|  | 12/31/2018 |  |  | 12/31/2017 |
| Gross carrying amount |  |  | Fair value |  |  | Gross carrying amount |  |  | Fair value |
Current |  |  | 765 |  |  |  | 799 |  |  |  | 1,006 |  |  |  | 1,041 |
Up to one year |  |  | 765 |  |  |  | 799 |  |  |  | 1,006 |  |  |  | 1,041 |
Non-current |  |  | 467 |  |  |  | 470 |  |  |  | 664 |  |  |  | 705 |
From one to five years |  |  | 467 |  |  |  | 470 |  |  |  | 664 |  |  |  | 705 |

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