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Derivatives (Details 1) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid R$ (5,212) R$ 360
Adjustment to fair value (in results / stockholders' equity) 12,238 2,416
Fair value 7,026 2,776
Assets 1 [Member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid 58,080 35,601
Adjustment to fair value (in results / stockholders' equity) 34,359 19,650
Fair value 92,439 55,251
Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,479 2,136
Balance sheet account receivable / (received) (payable) paid (75) (8)
Adjustment to fair value (in results / stockholders' equity) (350) (145)
Fair value (425) (153)
Liability Position [Member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid (63,292) (35,241)
Adjustment to fair value (in results / stockholders' equity) (22,121) (17,234)
Fair value (85,413) (52,475)
Purchase Commitments [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 322,323 267,803
Purchase Commitments Shares [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 11,490 6,721
Purchase Commitments Commodities [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,266 774
Purchase Commitments Interest [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 275,950 236,105
Purchase Commitments Foreign Currency [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 33,617 24,203
Commitments To Sell [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 546,660 576,202
Commitments To Sell Shares [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 14,438 6,580
Commitments To Sell Commodities [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 6,878 4,982
Commitments To Sell Interest [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 490,906 547,150
Commitments To Sell Foreign Currency [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 34,438 17,490
Sales Receivable [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,110 2,869
Balance sheet account receivable / (received) (payable) paid 1,366 671
Adjustment to fair value (in results / stockholders' equity) 1 3
Fair value 1,367 674
Sales Deliverable [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,835 620
Balance sheet account receivable / (received) (payable) paid (1,147) (472)
Adjustment to fair value (in results / stockholders' equity) 2 1
Fair value (1,145) (471)
Credit Derivatives Asset Position Interest [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member] | Other Derivative Financial Instruments Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 6,696 5,194
Balance sheet account receivable / (received) (payable) paid 201 188
Adjustment to fair value (in results / stockholders' equity) 188 (33)
Fair value 389 155
Non Deliverable Forward Liability Position Commodities [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member] | Other Derivative Financial Instruments Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 143 196
Balance sheet account receivable / (received) (payable) paid  
Adjustment to fair value (in results / stockholders' equity) 6 4
Fair value 6 4
Credit Derivatives Asset Position Foreign Currency [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member] | Other Derivative Financial Instruments Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 7,673 34
Balance sheet account receivable / (received) (payable) paid  
Adjustment to fair value (in results / stockholders' equity) 843 466
Fair value 843 466
Other Derivative Financial Instruments Shares [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member] | Other Derivative Financial Instruments Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,137 855
Balance sheet account receivable / (received) (payable) paid (1)
Adjustment to fair value (in results / stockholders' equity) 25 17
Fair value 24 17
Futures contract [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 868,983 844,005
Futures contract [member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 206,406 205,457
Swap contract [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,844,414 2,396,474
Balance sheet account receivable / (received) (payable) paid (7,451) 230
Adjustment to fair value (in results / stockholders' equity) 11,485 1,986
Fair value 4,034 2,216
Swap contract [member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,681,181 1,271,339
Swap contract [member] | Liability Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,844,414 2,396,474
Balance sheet account receivable / (received) (payable) paid (32,136) (19,660)
Adjustment to fair value (in results / stockholders' equity) (19,258) (16,081)
Fair value (51,394) (35,741)
Swap contract [member] | Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,844,414 2,396,474
Balance sheet account receivable / (received) (payable) paid 24,685 19,890
Adjustment to fair value (in results / stockholders' equity) 30,743 18,067
Fair value 55,428 37,957
Swap contract [member] | Asset Position Shares [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 24,730 369
Balance sheet account receivable / (received) (payable) paid 128 7
Adjustment to fair value (in results / stockholders' equity) (45) 6
Fair value 83 13
Swap contract [member] | Asset Position Commodities [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 147 708
Balance sheet account receivable / (received) (payable) paid 1 19
Adjustment to fair value (in results / stockholders' equity) 4 1
Fair value 5 20
Swap contract [member] | Asset Position Interest [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,613,244 2,213,528
Balance sheet account receivable / (received) (payable) paid 15,244 17,807
Adjustment to fair value (in results / stockholders' equity) 27,868 15,079
Fair value 43,112 32,886
Swap contract [member] | Asset Position Foreign Currency [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 206,293 181,869
Balance sheet account receivable / (received) (payable) paid 9,312 2,057
Adjustment to fair value (in results / stockholders' equity) 2,916 2,981
Fair value 12,228 5,038
Swap contract [member] | Liability Position Shares [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 30,542 3,416
Balance sheet account receivable / (received) (payable) paid (1,484) (612)
Adjustment to fair value (in results / stockholders' equity) 985 405
Fair value (499) (207)
Swap contract [member] | Liability Position Commodities [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 757 2,088
Balance sheet account receivable / (received) (payable) paid (37)
Adjustment to fair value (in results / stockholders' equity) (4) 4
Fair value (4) (33)
Swap contract [member] | Liability Position Interest [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,586,466 2,175,623
Balance sheet account receivable / (received) (payable) paid (18,387) (17,168)
Adjustment to fair value (in results / stockholders' equity) (18,067) (13,225)
Fair value (36,454) (30,393)
Swap contract [member] | Liability Position Foreign Currency [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 226,649 215,347
Balance sheet account receivable / (received) (payable) paid (12,265) (1,843)
Adjustment to fair value (in results / stockholders' equity) (2,172) (3,265)
Fair value (14,437) (5,108)
Option contract [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,325,428 1,648,851
Balance sheet account receivable / (received) (payable) paid 871 (1,005)
Adjustment to fair value (in results / stockholders' equity) (289) (249)
Fair value 582 (1,254)
Option contract [member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 52,029 32,413
Option contract [member] | Purchase Commitments [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 415,232 226,918
Balance sheet account receivable / (received) (payable) paid 15,680 4,313
Adjustment to fair value (in results / stockholders' equity) 2,908 688
Fair value 18,588 5,001
Option contract [member] | Purchase Commitments [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 423,455 212,969
Balance sheet account receivable / (received) (payable) paid (15,629) (4,679)
Adjustment to fair value (in results / stockholders' equity) (3,077) (447)
Fair value (18,706) (5,126)
Option contract [member] | Purchase Commitments Shares [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 57,471 42,955
Balance sheet account receivable / (received) (payable) paid 13,309 3,072
Adjustment to fair value (in results / stockholders' equity) 21 1,529
Fair value 13,330 4,601
Option contract [member] | Purchase Commitments Shares [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 53,380 41,220
Balance sheet account receivable / (received) (payable) paid (11,592) (2,905)
Adjustment to fair value (in results / stockholders' equity) 262 (1,048)
Fair value (11,330) (3,953)
Option contract [member] | Purchase Commitments Commodities [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 4,761 3,130
Balance sheet account receivable / (received) (payable) paid 252 280
Adjustment to fair value (in results / stockholders' equity) 114 (123)
Fair value 366 157
Option contract [member] | Purchase Commitments Commodities [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 4,822 1,799
Balance sheet account receivable / (received) (payable) paid (153) (79)
Adjustment to fair value (in results / stockholders' equity) (85) (2)
Fair value (238) (81)
Option contract [member] | Purchase Commitments Interest [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 302,455 146,915
Balance sheet account receivable / (received) (payable) paid 725 241
Adjustment to fair value (in results / stockholders' equity) 1,705 (103)
Fair value 2,430 138
Option contract [member] | Purchase Commitments Interest [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 304,499 140,310
Balance sheet account receivable / (received) (payable) paid (2,191) (1,001)
Adjustment to fair value (in results / stockholders' equity) (1,708) 123
Fair value (3,899) (878)
Option contract [member] | Purchase Commitments Foreign Currency [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 50,545 33,918
Balance sheet account receivable / (received) (payable) paid 1,394 720
Adjustment to fair value (in results / stockholders' equity) 1,068 (615)
Fair value 2,462 105
Option contract [member] | Purchase Commitments Foreign Currency [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 60,754 29,640
Balance sheet account receivable / (received) (payable) paid (1,693) (694)
Adjustment to fair value (in results / stockholders' equity) (1,546) 480
Option contract [member] | Commitments To Sell [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 745,131 588,977
Balance sheet account receivable / (received) (payable) paid 3,651 3,364
Adjustment to fair value (in results / stockholders' equity) (1,069) (647)
Fair value 2,582 2,717
Option contract [member] | Commitments To Sell [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 741,610 619,987
Balance sheet account receivable / (received) (payable) paid (2,831) (4,003)
Adjustment to fair value (in results / stockholders' equity) 949 157
Fair value (1,882) (3,846)
Option contract [member] | Commitments To Sell Shares [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 66,670 45,623
Balance sheet account receivable / (received) (payable) paid 1,351 2,332
Adjustment to fair value (in results / stockholders' equity) 35 (887)
Fair value 1,386 1,445
Option contract [member] | Commitments To Sell Shares [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid (124) (122)
Adjustment to fair value (in results / stockholders' equity) (48)
Fair value (124) (170)
Option contract [member] | Commitments To Sell Commodities [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,762 1,409
Balance sheet account receivable / (received) (payable) paid 59 55
Adjustment to fair value (in results / stockholders' equity) (4) 5
Fair value 55 60
Option contract [member] | Commitments To Sell Commodities [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,720 2,947
Option contract [member] | Commitments To Sell Interest [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 623,204 521,735
Balance sheet account receivable / (received) (payable) paid 162 306
Adjustment to fair value (in results / stockholders' equity) (153) 74
Fair value 9 380
Option contract [member] | Commitments To Sell Interest [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 623,629 545,656
Balance sheet account receivable / (received) (payable) paid (159) (340)
Adjustment to fair value (in results / stockholders' equity) 134 (51)
Fair value (25) (391)
Option contract [member] | Commitments To Sell Foreign Currency [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 53,495 20,210
Balance sheet account receivable / (received) (payable) paid 2,079 671
Adjustment to fair value (in results / stockholders' equity) (947) 161
Fair value 1,132 832
Option contract [member] | Commitments To Sell Foreign Currency [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 49,220 24,984
Balance sheet account receivable / (received) (payable) paid (1,418) (765)
Adjustment to fair value (in results / stockholders' equity) 1,071 (397)
Fair value (347) (1,162)
Option contract [member] | Purchase Commitments Interest Foreign Currency [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Fair value (3,239) (214)
Option contract [member] | Commitment To Sell Shares [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 66,041 46,400
Balance sheet account receivable / (received) (payable) paid (1,130) (2,776)
Adjustment to fair value (in results / stockholders' equity) (256) 653
Fair value (1,386) (2,123)
Forward contract [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 5,273 6,022
Forward contract [member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 17 16
Forward contract [member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 5,273 6,022
Balance sheet account receivable / (received) (payable) paid 287 290
Adjustment to fair value (in results / stockholders' equity) 2 2
Fair value 289 292
Purchases Receivable [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 328 2,533
Balance sheet account receivable / (received) (payable) paid 373 2,602
Adjustment to fair value (in results / stockholders' equity) (1) (2)
Fair value 372 2,600
Purchases Receivable [Member] | Purchases Receivable Shares [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 37 38
Balance sheet account receivable / (received) (payable) paid 37 38
Adjustment to fair value (in results / stockholders' equity) (1) (2)
Fair value 36 36
Purchases Receivable [Member] | Purchases Receivable Interest [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 291 2,495
Balance sheet account receivable / (received) (payable) paid 336 2,564
Adjustment to fair value (in results / stockholders' equity)
Fair value 336 2,564
Purchases Payable [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount
Balance sheet account receivable / (received) (payable) paid (305) (2,511)
Adjustment to fair value (in results / stockholders' equity)
Fair value (305) (2,511)
Purchases Payable [Member] | Purchases Payable Commodities [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount
Balance sheet account receivable / (received) (payable) paid (15) (16)
Adjustment to fair value (in results / stockholders' equity)
Fair value (15) (16)
Purchases Payable [Member] | Purchases Payable Interest [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount
Balance sheet account receivable / (received) (payable) paid (290) (2,495)
Adjustment to fair value (in results / stockholders' equity)
Fair value (290) (2,495)
Sales Receivable Interests [Member] | Commitments To Sell Commodities [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 18 16
Balance sheet account receivable / (received) (payable) paid 18 16
Adjustment to fair value (in results / stockholders' equity) 3
Fair value 18 19
Sales Receivable Interests [Member] | Commitments To Sell Foreign Currency [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,806 2,627
Balance sheet account receivable / (received) (payable) paid 1
Adjustment to fair value (in results / stockholders' equity)
Fair value 1
Sales Receivable Interests [Member] | Sales Receivable Shares [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 286 225
Balance sheet account receivable / (received) (payable) paid 281 223
Adjustment to fair value (in results / stockholders' equity) 1
Fair value 282 223
Sales Receivable Interests [Member] | Sales Receivable Interest [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1
Adjustment to fair value (in results / stockholders' equity)
Sales Receivable Interests [Member] | Sales Receivable Interests [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid 1,066 432
Fair value 1,066 432
Sales Deliverable [Member] | Sales Deliverable Interest [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,066 431
Balance sheet account receivable / (received) (payable) paid (1,146) (472)
Adjustment to fair value (in results / stockholders' equity) 4 1
Fair value (1,142) (471)
Sales Deliverable [Member] | Sales Deliverable Foreign Currency [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,769 189
Balance sheet account receivable / (received) (payable) paid (1)
Adjustment to fair value (in results / stockholders' equity) (2)
Fair value (3)
Credit Derivatives [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 100,812 53,033
Credit Derivatives [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 54,189 40,059
Credit Derivatives [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid (210) (17)
Adjustment to fair value (in results / stockholders' equity) 48 150
Fair value (162) 133
Credit Derivatives [Member] | Asset Position [Member] | Not later than one year [member] | Credit Derivatives Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 72,064 38,069
Balance sheet account receivable / (received) (payable) paid 584 (196)
Adjustment to fair value (in results / stockholders' equity) 49 478
Fair value 633 282
Credit Derivatives [Member] | Liability Position Shares [Member] | Credit Derivatives Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,963 1,347
Balance sheet account receivable / (received) (payable) paid (41) (18)
Adjustment to fair value (in results / stockholders' equity) (78) (12)
Fair value (119) (30)
Credit Derivatives [Member] | Liability Position Commodities [Member] | Credit Derivatives Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount   1
Credit Derivatives [Member] | Liability Position Interest [Member] | Credit Derivatives Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 25,785 13,616
Balance sheet account receivable / (received) (payable) paid (753) 197
Adjustment to fair value (in results / stockholders' equity) 77 (316)
Fair value (676) (119)
Credit Derivatives [Member] | Credit Derivatives Asset Position Shares [Member] | Not later than one year [member] | Credit Derivatives Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 4,976 4,255
Balance sheet account receivable / (received) (payable) paid 94 69
Adjustment to fair value (in results / stockholders' equity) 80 75
Fair value 174 144
Credit Derivatives [Member] | Credit Derivatives Asset Position Commodities [Member] | Not later than one year [member] | Credit Derivatives Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 26 15
Balance sheet account receivable / (received) (payable) paid  
Adjustment to fair value (in results / stockholders' equity)  
Fair value  
Credit Derivatives [Member] | Credit Derivatives Asset Position Interest [Member] | Not later than one year [member] | Credit Derivatives Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 67,062 33,799
Balance sheet account receivable / (received) (payable) paid 490 (265)
Adjustment to fair value (in results / stockholders' equity) (31) 403
Fair value 459 138
Credit Derivatives [Member] | Liability Position [Member] | Credit Derivatives Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 28,748 14,964
Balance sheet account receivable / (received) (payable) paid (794) 179
Adjustment to fair value (in results / stockholders' equity) (1) (328)
Fair value (795) (149)
Credit Derivatives [Member] | Credit Derivatives Asset Position Foreign Currency [Member] | Not later than one year [member] | Credit Derivatives Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 311,728 138,663
Non Deliverable Forward [Member] | Not later than one year [member] | Non Deliverable Forward Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 632,408 316,620
Balance sheet account receivable / (received) (payable) paid 1,166 682
Adjustment to fair value (in results / stockholders' equity) 280 218
Fair value 1,446 900
Non Deliverable Forward [Member] | Asset Position [Member] | Not later than one year [member] | Non Deliverable Forward Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 316,826 175,223
Balance sheet account receivable / (received) (payable) paid 11,541 4,769
Adjustment to fair value (in results / stockholders' equity) 666 609
Fair value 12,207 5,378
Non Deliverable Forward [Member] | Liability Position [Member] | Non Deliverable Forward Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 315,582 141,397
Balance sheet account receivable / (received) (payable) paid (10,375) (4,087)
Adjustment to fair value (in results / stockholders' equity) (386) (391)
Fair value (10,761) (4,478)
Non Deliverable Forward [Member] | Non Deliverable Forward Asset Position Commodities [Member] | Not later than one year [member] | Non Deliverable Forward Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 2,689 2,406
Non Deliverable Forward [Member] | Non Deliverable Forward Asset Position Commodities [Member] | Non Deliverable Forward Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid 284 269
Adjustment to fair value (in results / stockholders' equity) (32) (45)
Fair value 252 224
Non Deliverable Forward [Member] | Non Deliverable Forward Asset Position Foreign Currency [Member] | Not later than one year [member] | Non Deliverable Forward Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 314,137 172,817
Non Deliverable Forward [Member] | Non Deliverable Forward Asset Position Foreign Currency [Member] | Non Deliverable Forward Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid 11,257 4,500
Adjustment to fair value (in results / stockholders' equity) 698 654
Fair value 11,955 5,154
Non Deliverable Forward [Member] | Non Deliverable Forward Liability Position Commodities [Member] | Non Deliverable Forward Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 3,854 2,734
Balance sheet account receivable / (received) (payable) paid (310) (134)
Adjustment to fair value (in results / stockholders' equity) 5 (12)
Fair value (305) (146)
Non Deliverable Forward [Member] | Credit Derivatives Asset Position Foreign Currency [Member] | Non Deliverable Forward Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Balance sheet account receivable / (received) (payable) paid (10,065) (3,953)
Adjustment to fair value (in results / stockholders' equity) (391) (379)
Fair value (10,456) (4,332)
Other Derivative Financial Instruments [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 18,128 8,415
Other Derivative Financial Instruments [Member] | Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 8,962 6,618
Other Derivative Financial Instruments [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 18,128 8,415
Balance sheet account receivable / (received) (payable) paid 125 180
Adjustment to fair value (in results / stockholders' equity) 712 309
Fair value 837 489
Other Derivative Financial Instruments [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member] | Other Derivative Financial Instruments Asset Position [Member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 15,649 6,279
Balance sheet account receivable / (received) (payable) paid 200 188
Adjustment to fair value (in results / stockholders' equity) 1,062 454
Fair value 1,262 642
Other Derivative Financial Instruments [Member] | Other Derivative Financial Instruments Shares [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 1,970 1,385
Balance sheet account receivable / (received) (payable) paid (5) (1)
Adjustment to fair value (in results / stockholders' equity) (20) (14)
Fair value (25) (15)
Other Derivative Financial Instruments [Member] | Other Derivative Financial Instruments Commodities [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 184 209
Balance sheet account receivable / (received) (payable) paid  
Adjustment to fair value (in results / stockholders' equity) (6) (4)
Fair value (6) (4)
Other Derivative Financial Instruments [Member] | Other Derivative Financial Instruments Interest [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 275 382
Balance sheet account receivable / (received) (payable) paid (36) (7)
Adjustment to fair value (in results / stockholders' equity) (86) (15)
Fair value (122) (22)
Other Derivative Financial Instruments [Member] | Other Derivative Financial Instruments Foreign Currency [Member] | Other Derivative Financial Instruments Liability Position [Member] | Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Off-balance sheet notional amount 50 160
Balance sheet account receivable / (received) (payable) paid (34)  
Adjustment to fair value (in results / stockholders' equity) (238) (112)
Fair value R$ (272) R$ (112)