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Contingent Assets and Liabilities, Provisions and Legal Obligations - Summary of Changes in Civil, Labor and Other Risks Provisions (Detail) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of other provisions [line items] |  |
Opening balance | R$ 18,613 |
Closing balance | 21,454 | R$ 18,613
Legal proceedings provision [member] |  |
Disclosure of other provisions [line items] |  |
Opening balance | 4,426 | 5,300
(-) Provisions guaranteed by indemnity clause (Note 2.4.n) | (226) | (243)
Subtotal | 4,200 | 5,057
Adjustment / Interest (Note 23) | 122 | 145
Changes in the period reflected in income | 726 | 319
Increase | 1,177 | 774
Reversal | (451) | (455)
Payment | (1,631) | (1,321)
Subtotal | 3,417 | 4,200
(+) Provisions guaranteed by indemnity clause (Note 2.4.n) | 216 | 226
Closing balance | 3,633 | 4,426
Current | 1,662 | 1,350
Non-current | 1,971 | 3,076
Labor [Member] |  |
Disclosure of other provisions [line items] |  |
Opening balance | 6,821 | 7,283
(-) Provisions guaranteed by indemnity clause (Note 2.4.n) | (957) | (998)
Subtotal | 5,864 | 6,285
Adjustment / Interest (Note 23) | 1,024 | 508
Changes in the period reflected in income | 3,160 | 1,982
Increase | 3,325 | 2,152
Reversal | (165) | (170)
Payment | (2,449) | (2,911)
Subtotal | 7,599 | 5,864
(+) Provisions guaranteed by indemnity clause (Note 2.4.n) | 980 | 957
Closing balance | 8,579 | 6,821
Current | 2,451 | 2,911
Non-current | 6,128 | 3,910
Other [Member] |  |
Disclosure of other provisions [line items] |  |
Opening balance | 573 | 150
(-) Provisions guaranteed by indemnity clause (Note 2.4.n) | 0 |
Subtotal | 573 | 150
Adjustment / Interest (Note 23) | 0 |
Changes in the period reflected in income | 403 | 423
Increase | 435 | 425
Reversal | (32) | (2)
Payment | 0 |
Subtotal | 976 | 573
(+) Provisions guaranteed by indemnity clause (Note 2.4.n) | 0 |
Closing balance | 976 | 573
Current | 976 | 573
Non-current | 0 |
Civil labor and other provisions [member] |  |
Disclosure of other provisions [line items] |  |
Opening balance | 11,820 | 12,733
(-) Provisions guaranteed by indemnity clause (Note 2.4.n) | (1,183) | (1,241)
Subtotal | 10,637 | 11,492
Adjustment / Interest (Note 23) | 1,146 | 653
Changes in the period reflected in income | 4,289 | 2,724
Increase | 4,937 | 3,351
Reversal | (648) | (627)
Payment | (4,080) | (4,232)
Subtotal | 11,992 | 10,637
(+) Provisions guaranteed by indemnity clause (Note 2.4.n) | 1,196 | 1,183
Closing balance | 13,188 | 11,820
Current | 5,089 | 4,834
Non-current | R$ 8,099 | R$ 6,986

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