XML 124 R87.htm IDEA: XBRL DOCUMENT
v3.22.1

Derivatives - Summary of the Composition of Derivatives by Index (Detail) - BRL (R$) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | R$ 17,778,000,000
Balance sheet account receivable / (received) (payable) paid | R$ 387,000,000 | (3,874,000,000)
Adjustment to fair value (in results / stockholders' equity) | 5,454,000,000 | 873,000,000
Fair value | 5,841,000,000 | (3,001,000,000)
Purchase commitments [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 470,895,000,000 |
Purchase commitments shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 14,627,000,000 |
Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 703,000,000 |
Purchase commitments interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 429,862,000,000 | 304,454,000,000
Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 25,703,000,000 | 24,241,000,000
Commitments to sell [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 386,886,000,000 | 443,288,000,000
Commitments to sell shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 14,181,000,000 | 7,535,000,000
Commodities [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 3,308,000,000 | 2,201,000,000
Commitments to sell interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 342,575,000,000 | 397,157,000,000
Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 26,822,000,000 | 36,395,000,000
Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 932,000,000 | 1,139,000,000
Balance sheet account receivable / (received) (payable) paid | (139,000,000) | (15,000,000)
Adjustment to fair value (in results / stockholders' equity) | (16,000,000) | (32,000,000)
Fair value | (155,000,000) | (47,000,000)
Up to one year [member] | Purchases receivable [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 18,666,000,000
Balance sheet account receivable / (received) (payable) paid |  | 1,014,000,000
Adjustment to fair value (in results / stockholders' equity) |  | (3,000,000)
Fair value |  | 1,011,000,000
Up to one year [member] | Sales deliverable [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | (694,000,000) |
Fair value | (694,000,000) |
Up to one year [member] | Sales deliverable interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | (694,000,000) |
Fair value | (694,000,000) |
Up to one year [member] | Sales deliverable foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Adjustment to fair value (in results / stockholders' equity) | 0 |
Up to one year [member] | Foreign currency [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 19,507,000,000
Adjustment to fair value (in results / stockholders' equity) | 15,000,000 |
Fair value | 15,000,000 |
Up to one year [member] | Sales Receivable [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 20,765,000,000 | 1,132,000,000
Balance sheet account receivable / (received) (payable) paid | 1,938,000,000 | 1,073,000,000
Adjustment to fair value (in results / stockholders' equity) | 14,000,000 | 1,000,000
Fair value | 1,952,000,000 | 1,074,000,000
Assets 1 [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | 42,097,000,000 | 43,791,000,000
Adjustment to fair value (in results / stockholders' equity) | 26,948,000,000 | 32,713,000,000
Fair value | 69,045,000,000 | 76,504,000,000
Futures contracts [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 857,781,000,000 | 781,453,000,000
Futures contracts [Member] | Purchase commitments [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 338,165,000,000
Futures contracts [Member] | Purchase commitments shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 8,300,000,000
Futures contracts [Member] | Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 1,170,000,000
Futures contracts [Member] | Non-current [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 164,160,000,000 | 125,197,000,000
Swap contract [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,338,457,000,000 | 1,442,449,000,000
Balance sheet account receivable / (received) (payable) paid | (1,861,000,000) | (6,054,000,000)
Adjustment to fair value (in results / stockholders' equity) | 5,229,000,000 | 284,000,000
Fair value | 3,368,000,000 | (5,770,000,000)
Swap contract [member] | Asset position [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,338,457,000,000 | 1,442,449,000,000
Balance sheet account receivable / (received) (payable) paid | 13,410,000,000 | 16,840,000,000
Adjustment to fair value (in results / stockholders' equity) | 24,604,000,000 | 29,179,000,000
Fair value | 38,014,000,000 | 46,019,000,000
Swap contract [member] | Asset position interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,318,082,000,000 | 1,423,134,000,000
Balance sheet account receivable / (received) (payable) paid | 10,339,000,000 | 14,030,000,000
Adjustment to fair value (in results / stockholders' equity) | 23,835,000,000 | 27,953,000,000
Fair value | 34,174,000,000 | 41,983,000,000
Swap contract [member] | Asset position - Foreign currency [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 20,373,000,000 | 19,037,000,000
Balance sheet account receivable / (received) (payable) paid | 3,071,000,000 | 2,809,000,000
Adjustment to fair value (in results / stockholders' equity) | 769,000,000 | 1,226,000,000
Fair value | 3,840,000,000 | 4,035,000,000
Swap contract [member] | Liability position [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,338,457,000,000 | 1,442,449,000,000
Balance sheet account receivable / (received) (payable) paid |  | (22,894,000,000)
Adjustment to fair value (in results / stockholders' equity) |  | (28,895,000,000)
Fair value |  | (51,789,000,000)
Swap contract [member] | Liability position shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 497,000,000 | 108,000,000
Balance sheet account receivable / (received) (payable) paid | (37,000,000) | (12,000,000)
Adjustment to fair value (in results / stockholders' equity) | (3,000,000) | 2,000,000
Fair value | (40,000,000) | (10,000,000)
Swap contract [member] | Liability position interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,309,778,000,000 | 1,425,904,000,000
Balance sheet account receivable / (received) (payable) paid | (13,331,000,000) | (19,112,000,000)
Adjustment to fair value (in results / stockholders' equity) | (19,377,000,000) | (28,584,000,000)
Fair value | (32,708,000,000) | (47,696,000,000)
Swap contract [member] | Foreign currency [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 28,052,000,000 | 16,096,000,000
Balance sheet account receivable / (received) (payable) paid | (1,903,000,000) | (3,761,000,000)
Adjustment to fair value (in results / stockholders' equity) | 6,000,000 | (313,000,000)
Fair value | (1,897,000,000) | (4,074,000,000)
Swap contract [member] | Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 2,000,000 | 278,000,000
Balance sheet account receivable / (received) (payable) paid |  | 1,000,000
Fair value |  | 1,000,000
Swap contract [member] | Commodities [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 130,000,000 | 341,000,000
Balance sheet account receivable / (received) (payable) paid |  | (9,000,000)
Adjustment to fair value (in results / stockholders' equity) | (1,000,000) |
Fair value | (1,000,000) | (9,000,000)
Swap contract [member] | Non-current [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 930,714,000,000 | 927,540,000,000
Option contract [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,621,736,000,000 | 1,738,849,000,000
Balance sheet account receivable / (received) (payable) paid | 154,000,000 | 22,000,000
Adjustment to fair value (in results / stockholders' equity) | (1,449,000,000) | 134,000,000
Fair value | (1,295,000,000) | 156,000,000
Option contract [member] | Non-current [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 77,281,000,000 | 258,493,000,000
Option contract [member] | Non-current [Member] | Purchase commitments [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 145,412,000,000 | 131,134,000,000
Balance sheet account receivable / (received) (payable) paid | 17,981,000,000 | 14,538,000,000
Adjustment to fair value (in results / stockholders' equity) | 1,496,000,000 | 1,828,000,000
Fair value | 19,477,000,000 | 16,366,000,000
Option contract [member] | Non-current [Member] | Purchase commitments shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 11,929,000,000 | 12,400,000,000
Balance sheet account receivable / (received) (payable) paid | 521,000,000 | 345,000,000
Adjustment to fair value (in results / stockholders' equity) | 1,140,000,000 | 976,000,000
Fair value | 1,661,000,000 | 1,321,000,000
Option contract [member] | Non-current [Member] | Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 471,000,000 | 356,000,000
Balance sheet account receivable / (received) (payable) paid | 20,000,000 | 14,000,000
Adjustment to fair value (in results / stockholders' equity) | 20,000,000 | 13,000,000
Fair value | 40,000,000 | 27,000,000
Option contract [member] | Non-current [Member] | Purchase commitments interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 63,697,000,000 | 50,771,000,000
Balance sheet account receivable / (received) (payable) paid | 127,000,000 | 614,000,000
Adjustment to fair value (in results / stockholders' equity) | 98,000,000 | (282,000,000)
Fair value | 225,000,000 | 332,000,000
Option contract [member] | Non-current [Member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 69,315,000,000 | 67,607,000,000
Balance sheet account receivable / (received) (payable) paid | 17,313,000,000 | 13,565,000,000
Adjustment to fair value (in results / stockholders' equity) | 238,000,000 | 1,121,000,000
Fair value | 17,551,000,000 | 14,686,000,000
Option contract [member] | Non-current [Member] | Commitments to sell [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 668,380,000,000 | 743,573,000,000
Balance sheet account receivable / (received) (payable) paid | 2,433,000,000 | 2,933,000,000
Adjustment to fair value (in results / stockholders' equity) | (658,000,000) | 1,119,000,000
Fair value | 1,775,000,000 | 4,052,000,000
Option contract [member] | Non-current [Member] | Commitments to sell shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 18,928,000,000 | 14,659,000,000
Balance sheet account receivable / (received) (payable) paid | 878,000,000 | 728,000,000
Adjustment to fair value (in results / stockholders' equity) | 339,000,000 | 62,000,000
Fair value | 1,217,000,000 | 790,000,000
Option contract [member] | Non-current [Member] | Commodities [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 306,000,000 | 75,000,000
Balance sheet account receivable / (received) (payable) paid | 9,000,000 | 2,000,000
Adjustment to fair value (in results / stockholders' equity) | (3,000,000) | (1,000,000)
Fair value | 6,000,000 | 1,000,000
Option contract [member] | Non-current [Member] | Commitments to sell interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 582,086,000,000 | 659,826,000,000
Balance sheet account receivable / (received) (payable) paid | 154,000,000 | 1,087,000,000
Adjustment to fair value (in results / stockholders' equity) | (148,000,000) | 1,373,000,000
Fair value | 6,000,000 | 2,460,000,000
Option contract [member] | Non-current [Member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 67,060,000,000 | 69,013,000,000
Balance sheet account receivable / (received) (payable) paid | 1,392,000,000 | 1,116,000,000
Adjustment to fair value (in results / stockholders' equity) | (846,000,000) | (315,000,000)
Fair value | 546,000,000 | 801,000,000
Option contract [member] | Up to one year [member] | Purchase commitments [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 79,734,000,000 | 129,150,000,000
Balance sheet account receivable / (received) (payable) paid | (17,595,000,000) | (13,934,000,000)
Adjustment to fair value (in results / stockholders' equity) | (2,781,000,000) | (1,797,000,000)
Fair value | (20,376,000,000) | (15,731,000,000)
Option contract [member] | Up to one year [member] | Purchase commitments shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 14,045,000,000 | 13,080,000,000
Balance sheet account receivable / (received) (payable) paid | (348,000,000) | (348,000,000)
Adjustment to fair value (in results / stockholders' equity) | (1,185,000,000) | (1,119,000,000)
Fair value | (1,533,000,000) | (1,467,000,000)
Option contract [member] | Up to one year [member] | Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 274,000,000 | 899,000,000
Balance sheet account receivable / (received) (payable) paid | (8,000,000) | (28,000,000)
Adjustment to fair value (in results / stockholders' equity) | (1,000,000) | (18,000,000)
Fair value | (9,000,000) | (46,000,000)
Option contract [member] | Up to one year [member] | Purchase commitments interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 3,284,000,000 | 55,369,000,000
Balance sheet account receivable / (received) (payable) paid | (68,000,000) | (532,000,000)
Adjustment to fair value (in results / stockholders' equity) | (48,000,000) | 318,000,000
Fair value | (116,000,000) | (214,000,000)
Option contract [member] | Up to one year [member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 62,131,000,000 | 59,802,000,000
Balance sheet account receivable / (received) (payable) paid | (17,171,000,000) | (13,026,000,000)
Adjustment to fair value (in results / stockholders' equity) | (1,547,000,000) | (978,000,000)
Fair value | (18,718,000,000) | (14,004,000,000)
Option contract [member] | Up to one year [member] | Commitments to sell [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 728,210,000,000 | 734,992,000,000
Balance sheet account receivable / (received) (payable) paid | (2,665,000,000) | (3,515,000,000)
Adjustment to fair value (in results / stockholders' equity) | 494,000,000 | (1,016,000,000)
Fair value | (2,171,000,000) | (4,531,000,000)
Option contract [member] | Up to one year [member] | Commitments to sell shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 16,545,000,000 | 13,200,000,000
Balance sheet account receivable / (received) (payable) paid | (648,000,000) | (524,000,000)
Adjustment to fair value (in results / stockholders' equity) | (368,000,000) | (156,000,000)
Fair value | (1,016,000,000) | (680,000,000)
Option contract [member] | Up to one year [member] | Commodities [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 266,000,000 | 246,000,000
Balance sheet account receivable / (received) (payable) paid | (19,000,000) | (10,000,000)
Adjustment to fair value (in results / stockholders' equity) | 11,000,000 | 6,000,000
Fair value | (8,000,000) | (4,000,000)
Option contract [member] | Up to one year [member] | Commitments to sell interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 642,475,000,000 | 653,376,000,000
Balance sheet account receivable / (received) (payable) paid | (227,000,000) | (978,000,000)
Adjustment to fair value (in results / stockholders' equity) | 211,000,000 | (1,317,000,000)
Fair value | (16,000,000) | (2,295,000,000)
Option contract [member] | Up to one year [member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 68,924,000,000 | 68,170,000,000
Balance sheet account receivable / (received) (payable) paid | (1,771,000,000) | (2,003,000,000)
Adjustment to fair value (in results / stockholders' equity) | 640,000,000 | 451,000,000
Fair value | (1,131,000,000) | (1,552,000,000)
Forward [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 26,129,000,000 | 23,989,000,000
Forward [member] | Non-current [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 3,000,000 | 5,000,000
Forward [member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 26,129,000,000 | 23,989,000,000
Balance sheet account receivable / (received) (payable) paid | 2,362,000,000 | 1,195,000,000
Adjustment to fair value (in results / stockholders' equity) | (13,000,000) | (15,000,000)
Fair value | 2,349,000,000 | 1,180,000,000
Purchases receivable [Member] | Purchases receivable shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 948,000,000 |
Balance sheet account receivable / (received) (payable) paid | 948,000,000 |
Adjustment to fair value (in results / stockholders' equity) | (27,000,000) |
Fair value | 921,000,000 |
Purchases receivable [Member] | Purchases receivable interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 68,000,000 |
Balance sheet account receivable / (received) (payable) paid | 238,000,000 |
Fair value | 238,000,000 |
Purchases receivable [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,016,000,000 |
Balance sheet account receivable / (received) (payable) paid | 1,186,000,000 |
Adjustment to fair value (in results / stockholders' equity) | (27,000,000) |
Fair value | 1,159,000,000 |
Purchases receivable [Member] | Up to one year [member] | Purchases receivable shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 304,000,000
Balance sheet account receivable / (received) (payable) paid |  | 304,000,000
Adjustment to fair value (in results / stockholders' equity) |  | (3,000,000)
Fair value |  | 301,000,000
Purchases receivable [Member] | Up to one year [member] | Purchases receivable interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 584,000,000
Balance sheet account receivable / (received) (payable) paid |  | 710,000,000
Fair value |  | 710,000,000
Purchases payable [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 0 |
Balance sheet account receivable / (received) (payable) paid | (68,000,000) |
Fair value | (68,000,000) |
Purchases payable [Member] | Purchases payable interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 0 |
Balance sheet account receivable / (received) (payable) paid | (68,000,000) |
Fair value | (68,000,000) |
Purchases payable [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid |  | (584,000,000)
Fair value |  | (584,000,000)
Purchases payable [Member] | Up to one year [member] | Purchases payable interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid |  | (584,000,000)
Fair value |  | (584,000,000)
Purchases payable [Member] | Up to one year [member] | Foreign currency [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 362,000,000
Credit derivatives [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 21,556,000,000 | 20,060,000,000
Credit derivatives [Member] | Non-current [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 14,128,000,000 | 10,741,000,000
Credit derivatives [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 20,060,000,000
Balance sheet account receivable / (received) (payable) paid | (532,000,000) | (432,000,000)
Adjustment to fair value (in results / stockholders' equity) | 576,000,000 | 512,000,000
Fair value | 44,000,000 | 80,000,000
Credit derivatives [Member] | Asset position [Member] | Up to one year [member] | Asset position [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 13,414,000,000 | 15,877,000,000
Balance sheet account receivable / (received) (payable) paid | (271,000,000) | (270,000,000)
Adjustment to fair value (in results / stockholders' equity) | 513,000,000 | 426,000,000
Fair value | 242,000,000 | 156,000,000
Credit derivatives [Member] | Asset position [Member] | Up to one year [member] | Credit derivatives asset position shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,784,000,000 | 2,796,000,000
Balance sheet account receivable / (received) (payable) paid | (37,000,000) | (84,000,000)
Adjustment to fair value (in results / stockholders' equity) | 101,000,000 | 172,000,000
Fair value | 64,000,000 | 88,000,000
Credit derivatives [Member] | Asset position [Member] | Up to one year [member] | Credit derivatives asset position interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 11,612,000,000 | 13,062,000,000
Balance sheet account receivable / (received) (payable) paid | (234,000,000) | (186,000,000)
Adjustment to fair value (in results / stockholders' equity) | 412,000,000 | 253,000,000
Fair value | 178,000,000 | 67,000,000
Credit derivatives [Member] | Asset position [Member] | Up to one year [member] | Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 18,000,000 | 19,000,000
Adjustment to fair value (in results / stockholders' equity) |  | 1,000,000
Fair value |  | 1,000,000
Credit derivatives [Member] | Asset position [Member] | Up to one year [member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 133,304,000,000 | 155,946,000,000
Balance sheet account receivable / (received) (payable) paid |  | (6,216,000,000)
Adjustment to fair value (in results / stockholders' equity) |  | (172,000,000)
Fair value |  | (6,388,000,000)
Non deliverable forward [member] | Asset position [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 278,531,000,000 | 313,463,000,000
Balance sheet account receivable / (received) (payable) paid | 239,000,000 | 1,214,000,000
Adjustment to fair value (in results / stockholders' equity) | 808,000,000 | (44,000,000)
Fair value | 1,047,000,000 | 1,170,000,000
Non deliverable forward [member] | Asset position [Member] | Up to one year [member] | Asset position [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 144,123,000,000 | 156,542,000,000
Balance sheet account receivable / (received) (payable) paid | 5,256,000,000 | 7,467,000,000
Adjustment to fair value (in results / stockholders' equity) | 687,000,000 | 129,000,000
Fair value | 5,943,000,000 | 7,596,000,000
Non deliverable forward [member] | Asset position [Member] | Up to one year [member] | Commodities [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 2,489,000,000 | 1,715,000,000
Balance sheet account receivable / (received) (payable) paid |  | 278,000,000
Adjustment to fair value (in results / stockholders' equity) |  | (16,000,000)
Fair value |  | 262,000,000
Non deliverable forward [member] | Asset position [Member] | Up to one year [member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 141,629,000,000 | 2,000,000
Adjustment to fair value (in results / stockholders' equity) |  | 57,000,000
Fair value |  | 57,000,000
Other derivative financial instruments [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 6,064,000,000 | 6,413,000,000
Other derivative financial instruments [Member] | Non-current [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 4,502,000,000 | 5,410,000,000
Other derivative financial instruments [Member] | Liability position [Member] | Up to one year [member] | Other derivative financial instruments shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 576,000,000 | 47,000,000
Balance sheet account receivable / (received) (payable) paid | (9,000,000) | (3,000,000)
Adjustment to fair value (in results / stockholders' equity) | (12,000,000) | 3,000,000
Fair value | (21,000,000) |
Sales deliverable [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 4,348,000,000 | 4,191,000,000
Balance sheet account receivable / (received) (payable) paid |  | (308,000,000)
Adjustment to fair value (in results / stockholders' equity) |  | (13,000,000)
Fair value |  | (321,000,000)
Sales deliverable [Member] | Up to one year [member] | Sales deliverable shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 308,000,000
Balance sheet account receivable / (received) (payable) paid |  | (308,000,000)
Fair value |  | (308,000,000)
Sales deliverable [Member] | Up to one year [member] | Sales deliverable interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 694,000,000 |
Sales deliverable [Member] | Up to one year [member] | Sales deliverable foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 3,654,000,000 | 154,827,000,000
Balance sheet account receivable / (received) (payable) paid |  | 7,189,000,000
Adjustment to fair value (in results / stockholders' equity) |  | 145,000,000
Fair value |  | 7,334,000,000
Sales Receivable Interests [Member] | Up to one year [member] | Sales receivable shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,258,000,000 | 770,000,000
Balance sheet account receivable / (received) (payable) paid | 1,244,000,000 | 765,000,000
Adjustment to fair value (in results / stockholders' equity) | (1,000,000) | 1,000,000
Fair value | 1,243,000,000 | 766,000,000
Sales Receivable Interests [Member] | Up to one year [member] | Sales receivable interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 0 |
Balance sheet account receivable / (received) (payable) paid | 694,000,000 | 308,000,000
Fair value | 694,000,000 | 308,000,000
Sales Receivable Interests [Member] | Up to one year [member] | Foreign currency [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 3,883,000,000
Adjustment to fair value (in results / stockholders' equity) |  | (13,000,000)
Fair value |  | (13,000,000)
Liability position [Member] | Credit derivatives [Member] | Up to one year [member] | Liability position [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 8,142,000,000 | 4,183,000,000
Balance sheet account receivable / (received) (payable) paid | (261,000,000) | (162,000,000)
Adjustment to fair value (in results / stockholders' equity) | 63,000,000 | 86,000,000
Fair value | (198,000,000) | (76,000,000)
Liability position [Member] | Credit derivatives [Member] | Up to one year [member] | Liability position shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,865,000,000 | 1,154,000,000
Balance sheet account receivable / (received) (payable) paid | (63,000,000) | (45,000,000)
Adjustment to fair value (in results / stockholders' equity) | 17,000,000 | 11,000,000
Fair value | (46,000,000) | (34,000,000)
Liability position [Member] | Credit derivatives [Member] | Up to one year [member] | Liability position interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 6,277,000,000 | 3,026,000,000
Balance sheet account receivable / (received) (payable) paid | (198,000,000) | (117,000,000)
Adjustment to fair value (in results / stockholders' equity) | 46,000,000 | 75,000,000
Fair value | (152,000,000) | (42,000,000)
Liability position [Member] | Credit derivatives [Member] | Up to one year [member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | (4,967,000,000) |
Adjustment to fair value (in results / stockholders' equity) | 118,000,000 |
Fair value | (4,849,000,000) |
Liability position [Member] | Credit derivatives [Member] | Up to one year [member] | Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 3,000,000
Liability position [Member] | Non deliverable forward [member] | Up to one year [member] | Liability position [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 134,408,000,000 | 156,921,000,000
Balance sheet account receivable / (received) (payable) paid | (5,017,000,000) | (6,253,000,000)
Adjustment to fair value (in results / stockholders' equity) | 121,000,000 | (173,000,000)
Fair value | (4,896,000,000) | (6,426,000,000)
Liability position [Member] | Non deliverable forward [member] | Up to one year [member] | Commodities [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | 478,000,000 |
Adjustment to fair value (in results / stockholders' equity) | (1,000,000) |
Fair value | 477,000,000 |
Liability position [Member] | Non deliverable forward [member] | Up to one year [member] | Foreign currency [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | 4,778,000,000 |
Adjustment to fair value (in results / stockholders' equity) | 688,000,000 |
Fair value | 5,466,000,000 |
Liability position [Member] | Non deliverable forward [member] | Up to one year [member] | Commodities [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 1,104,000,000 | 975,000,000
Balance sheet account receivable / (received) (payable) paid | (50,000,000) | (37,000,000)
Adjustment to fair value (in results / stockholders' equity) | 3,000,000 | (1,000,000)
Fair value | (47,000,000) | (38,000,000)
Liability position [Member] | Other derivative financial instruments [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 6,064,000,000 |
Balance sheet account receivable / (received) (payable) paid | 25,000,000 |
Adjustment to fair value (in results / stockholders' equity) | 303,000,000 |
Fair value | 328,000,000 |
Liability position [Member] | Other derivative financial instruments [Member] | Up to one year [member] | Other derivative financial instruments shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 202,000,000 | 705,000,000
Balance sheet account receivable / (received) (payable) paid |  | (6,000,000)
Adjustment to fair value (in results / stockholders' equity) | 8,000,000 | (22,000,000)
Fair value | 8,000,000 | (28,000,000)
Liability position [Member] | Other derivative financial instruments [Member] | Up to one year [member] | Other derivative financial instruments interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 347,000,000 | 434,000,000
Balance sheet account receivable / (received) (payable) paid | (130,000,000) | (9,000,000)
Adjustment to fair value (in results / stockholders' equity) | (3,000,000) | (10,000,000)
Fair value | (133,000,000) | (19,000,000)
Liability position [Member] | Other derivative financial instruments [Member] | Up to one year [member] | Foreign currency [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 9,000,000 |
Adjustment to fair value (in results / stockholders' equity) | (1,000,000) |
Fair value | (1,000,000) |
Liability position [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | (41,710,000,000) | (47,665,000,000)
Adjustment to fair value (in results / stockholders' equity) | (21,494,000,000) | (31,840,000,000)
Fair value | (63,204,000,000) | (79,505,000,000)
Liability position [Member] | Swap contract [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Balance sheet account receivable / (received) (payable) paid | (15,271,000,000) |
Adjustment to fair value (in results / stockholders' equity) | (19,375,000,000) |
Fair value | (34,646,000,000) |
Asset position [Member] | Non deliverable forward [member] | Up to one year [member] | Foreign currency [Member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 61,000,000 |
Balance sheet account receivable / (received) (payable) paid | 3,000,000 |
Adjustment to fair value (in results / stockholders' equity) | 282,000,000 |
Fair value | 285,000,000 |
Asset position [Member] | Other derivative financial instruments [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount |  | 6,413,000,000
Balance sheet account receivable / (received) (payable) paid |  | 181,000,000
Adjustment to fair value (in results / stockholders' equity) |  | 2,000,000
Fair value |  | 183,000,000
Asset position [Member] | Other derivative financial instruments [Member] | Up to one year [member] | Other derivative financial instruments shares [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 5,000,000 |
Asset position [Member] | Other derivative financial instruments [Member] | Up to one year [member] | Other derivative financial instruments interest [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 4,869,000,000 | 5,225,000,000
Balance sheet account receivable / (received) (payable) paid | 161,000,000 | 199,000,000
Adjustment to fair value (in results / stockholders' equity) | 29,000,000 | (26,000,000)
Fair value | 190,000,000 | 173,000,000
Asset position [Member] | Other derivative financial instruments [Member] | Asset position [Member] | Up to one year [member] |  |
Disclosure of Financial Assets [Line Items] |  |
Off-balance sheet notional amount | 5,132,000,000 | 5,274,000,000
Balance sheet account receivable / (received) (payable) paid | 164,000,000 | 196,000,000
Adjustment to fair value (in results / stockholders' equity) | 319,000,000 | 34,000,000
Fair value | R$ 483,000,000 | R$ 230,000,000

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_NotionalAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Adjustment to market value in results stockholders equity + References No definition available. + Details
Name: | itub_AdjustmentToMarketValueInResultsStockholdersEquity
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Balance sheet amount receivable and payable. + References No definition available. + Details
Name: | itub_BalanceSheetAmountReceivableAndPayable
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value of derivative financial assets (liability). + References No definition available. + Details
Name: | itub_FairValueOfDerivativeFinancialAssetsLiability
Namespace Prefix: | itub_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchaseCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchaseCommitmentsSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchaseCommitmentsCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchaseCommitmentsInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchaseCommitmentsForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CommitmentsToSellMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CommitmentsToSellSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CommitmentsToSellCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CommitmentsToSellInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CommitmentsToSellForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchasesReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesDeliverableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesDeliverableInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesDeliverableForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesReceivableForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=itub_Assets1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_FuturesContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_SwapContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_AssetPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_AssetPositionInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_AssetPositionForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_LiabilityPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_LiabilityPositionSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_LiabilityPositionInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_LiabilityPositionForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_AssetPositionCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_LiabilityPositionCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_OptionContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_ForwardContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=itub_PurchasesReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchasesReceivableSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchasesReceivableInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=itub_PurchasesPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchasesPayableInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_PurchasesPayableForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=itub_CreditDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=itub_CreditDerivativesAssetPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CreditDerivativesAssetPositionSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CreditDerivativesAssetPositionInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CreditDerivativesAssetPositionCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CreditDerivativesAssetPositionForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=itub_NonDeliverableForwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=itub_NonDeliverableForwardAssetPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_NonDeliverableForwardAssetPositionCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_NonDeliverableForwardAssetPositionForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=itub_OtherDerivativeFinancialInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=itub_OtherDerivativeFinancialInstrumentsLiabilityPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_OtherDerivativeFinancialInstrumentsSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=itub_SalesDeliverableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesDeliverableSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=itub_SalesReceivableInterestsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesReceivableSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_SalesReceivableInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=itub_CreditDerivativesLiabilityPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_CreditDerivativesLiabilityPositionCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=itub_NonDeliverableForwardLiabilityPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_NonDeliverableForwardLiabilityPositionCommoditiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=itub_OtherDerivativeFinancialInstrumentsLiabilityPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_OtherDerivativeFinancialInstrumentsInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | itub_DerivativeInstrumentAxis=itub_OtherDerivativeFinancialInstrumentsForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=itub_LiabilityPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=itub_OtherDerivativeFinancialInstrumentsAssetPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=itub_OtherDerivativeFinancialInstrumentsAssetPositionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |