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Derivative Financial Instruments - Cashflow hedges (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets R$ 22,993,091 R$ 28,627,035 R$ 450,853
Hedged item, liabilities 22,975,081 20,518,415 20,548,013
Gains (losses) on hedges of net investments in foreign operations, net of tax (482,011) 1,857,291 (779,080)
Notional amount 46,671,688 96,419,266 20,967,990
Gain (losses) in the amounts used to calculate hedge ineffectiveness 519,944 (1,874,054) 799,112
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 37,933 (16,763) 20,032
Hedges of net investment in foreign operations [member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 684,297 675,168 450,853
Hedged item, liabilities 0 0 0
Gains (losses) on hedges of net investments in foreign operations, net of tax (70,908) 136,598 (34,603)
Notional amount 677,325 708,102 446,442
Gain (losses) in the amounts used to calculate hedge ineffectiveness 77,912 (138,777) 41,235
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 7,004 (2,179) 6,632
Hedges of net investment in foreign operations [member] | Currency risk [member] | Hedge of net investment in foreign operations [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 684,297 675,168 450,853
Hedged item, liabilities 0 0
Gains (losses) on hedges of net investments in foreign operations, net of tax (70,908) 136,598 (34,603)
Notional amount 677,325 708,102 446,442
Gain (losses) in the amounts used to calculate hedge ineffectiveness 77,912 (138,777) 41,235
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 7,004 (2,179) 6,632
Fair value hedges [member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 22,308,794 27,951,867 0
Hedged item, liabilities 22,789,158 20,284,105 20,133,698
Gains (losses) on hedges of net investments in foreign operations, net of tax (348,863) 1,514,992 (684,960)
Notional amount 45,767,762 48,670,528 20,082,783
Gain (losses) in the amounts used to calculate hedge ineffectiveness 392,833 (1,536,891) 686,971
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 43,970 (21,899) 2,011
Fair value hedges [member] | Currency risk [member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 0 0 0
Hedged item, liabilities 43,441 133,470 237,472
Gains (losses) on hedges of net investments in foreign operations, net of tax 7,544 (54,096) 9,881
Notional amount 43,496 134,802 223,565
Gain (losses) in the amounts used to calculate hedge ineffectiveness (7,609) 52,953 (15,064)
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income (65) (1,143) (5,183)
Fair value hedges [member] | Currency risk [member] | Issued bonds [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 0 0 0
Hedged item, liabilities 43,441 133,470 237,472
Gains (losses) on hedges of net investments in foreign operations, net of tax 7,544 (54,096) 9,881
Notional amount 43,496 134,802 223,565
Gain (losses) in the amounts used to calculate hedge ineffectiveness (7,609) 52,953 (15,064)
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income (65) (1,143) (5,183)
Fair value hedges [member] | Interest rate risk [member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 22,308,794 27,951,867 0
Hedged item, liabilities 22,745,717 20,150,635 19,896,226
Gains (losses) on hedges of net investments in foreign operations, net of tax (356,407) 1,569,088 (694,841)
Notional amount 45,724,266 48,535,726 19,859,218
Gain (losses) in the amounts used to calculate hedge ineffectiveness 400,442 (1,589,844) 702,035
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 44,035 (20,756) 7,194
Fair value hedges [member] | Interest rate risk [member] | Structured notes [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 0 0 0
Hedged item, liabilities 20,428,519 17,671,952 16,593,439
Gains (losses) on hedges of net investments in foreign operations, net of tax (819,917) 2,727,761 (816,142)
Notional amount 21,599,440 18,273,237 16,702,984
Gain (losses) in the amounts used to calculate hedge ineffectiveness 840,227 (2,817,265) 849,160
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 20,310 (89,504) 33,018
Fair value hedges [member] | Interest rate risk [member] | Issued bonds [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 0 0 0
Hedged item, liabilities 2,317,198 2,478,683 3,302,787
Gains (losses) on hedges of net investments in foreign operations, net of tax 159,648 (725,223) 121,301
Notional amount 2,353,595 2,410,196 3,156,234
Gain (losses) in the amounts used to calculate hedge ineffectiveness (189,556) 808,415 (147,125)
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income (29,908) 83,192 (25,824)
Fair value hedges [member] | Interest rate risk [member] | Brazilian sovereign bonds [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 16,710,279 24,728,299  
Hedged item, liabilities 0 0  
Gains (losses) on hedges of net investments in foreign operations, net of tax 160,659 (384,453)  
Notional amount 16,262,973 24,624,210  
Gain (losses) in the amounts used to calculate hedge ineffectiveness (166,510) 372,940  
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income (5,851) (11,513)  
Fair value hedges [member] | Interest rate risk [member] | Payroll loans [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 1,934,158 842,210  
Hedged item, liabilities 0 0  
Gains (losses) on hedges of net investments in foreign operations, net of tax 68,977 (31,328)  
Notional amount 1,788,141 850,579  
Gain (losses) in the amounts used to calculate hedge ineffectiveness (48,484) 29,466  
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 20,493 (1,862)  
Fair value hedges [member] | Interest rate risk [member] | Loan operations [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 3,664,357 2,381,358  
Hedged item, liabilities 0 0  
Gains (losses) on hedges of net investments in foreign operations, net of tax 74,226 (17,669)  
Notional amount 3,720,117 2,377,504  
Gain (losses) in the amounts used to calculate hedge ineffectiveness (35,235) 16,600  
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income 38,991 (1,069)  
Cash flow hedges      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 0 0 0
Hedged item, liabilities 185,923 234,310 414,315
Gains (losses) on hedges of net investments in foreign operations, net of tax (62,240) 205,701 (59,517)
Notional amount 226,601 206,068 438,765
Gain (losses) in the amounts used to calculate hedge ineffectiveness 49,199 (198,386) 70,906
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income (13,041) 7,315 11,389
Cash flow hedges | Market price risk [Member] | Long term incentive plan taxes [Member]      
Disclosure of detailed information about financial instruments [line items]      
Hedged item, assets 0 0 0
Hedged item, liabilities 185,923 234,310 414,315
Gains (losses) on hedges of net investments in foreign operations, net of tax (62,240) 205,701 (59,517)
Notional amount 226,601 206,068 438,765
Gain (losses) in the amounts used to calculate hedge ineffectiveness 49,199 (198,386) 70,906
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income R$ (13,041) R$ 7,315 R$ 11,389