v3.26.1
Fair value - Schedule of Breakdown of Fair Value Hierarchy Levels for Derivative Assets and Liabilities (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of assets [line items]      
Assets R$ 73,384 R$ 92,439  
Liabilities (69,760) (85,413)  
Options      
Disclosure of fair value measurement of assets [line items]      
Assets 11,726 21,170  
Liabilities (8,402) (20,588)  
Forward      
Disclosure of fair value measurement of assets [line items]      
Assets 4,607 1,739  
Liabilities (4,381) (1,450)  
Swaps      
Disclosure of fair value measurement of assets [line items]      
Assets 47,184 55,428  
Liabilities (45,453) (51,394)  
NDF      
Disclosure of fair value measurement of assets [line items]      
Assets 8,351 12,207  
Liabilities (10,929) (10,761)  
Credit derivatives      
Disclosure of fair value measurement of assets [line items]      
Assets 615 633  
Liabilities (367) (795)  
Other      
Disclosure of fair value measurement of assets [line items]      
Assets 901 1,262  
Liabilities (228) (425)  
Level 1      
Disclosure of fair value measurement of assets [line items]      
Assets 21 5  
Liabilities (418) (67)  
Level 1 | Options      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities (30) 0  
Level 1 | Forward      
Disclosure of fair value measurement of assets [line items]      
Assets 4 0  
Liabilities (338) 0  
Level 1 | Swaps      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 0 0  
Level 1 | NDF      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 0 0  
Level 1 | Credit derivatives      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 0 0  
Level 1 | Other      
Disclosure of fair value measurement of assets [line items]      
Assets 17 5  
Liabilities (50) (67)  
Level 2      
Disclosure of fair value measurement of assets [line items]      
Assets 72,982 92,062  
Liabilities (67,760) (85,171)  
Level 2 | Options      
Disclosure of fair value measurement of assets [line items]      
Assets 11,707 21,139  
Liabilities (8,350) (20,580)  
Level 2 | Forward      
Disclosure of fair value measurement of assets [line items]      
Assets 4,586 1,721  
Liabilities (4,028) (1,435)  
Level 2 | Swaps      
Disclosure of fair value measurement of assets [line items]      
Assets 46,839 55,106  
Liabilities (43,908) (51,242)  
Level 2 | NDF      
Disclosure of fair value measurement of assets [line items]      
Assets 8,351 12,207  
Liabilities (10,929) (10,761)  
Level 2 | Credit derivatives      
Disclosure of fair value measurement of assets [line items]      
Assets 615 632  
Liabilities (367) (795)  
Level 2 | Other      
Disclosure of fair value measurement of assets [line items]      
Assets 884 1,257  
Liabilities (178) (358)  
Level 3      
Disclosure of fair value measurement of assets [line items]      
Assets 381 372 R$ 262
Liabilities (1,582) (175)  
Level 3 | Options      
Disclosure of fair value measurement of assets [line items]      
Assets 19 31  
Liabilities (22) (8)  
Level 3 | Forward      
Disclosure of fair value measurement of assets [line items]      
Assets 17 18  
Liabilities (15) (15)  
Level 3 | Swaps      
Disclosure of fair value measurement of assets [line items]      
Assets 345 322  
Liabilities (1,545) (152)  
Level 3 | NDF      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities 0 0  
Level 3 | Credit derivatives      
Disclosure of fair value measurement of assets [line items]      
Assets 0 1  
Liabilities 0 0  
Level 3 | Other      
Disclosure of fair value measurement of assets [line items]      
Assets 0 0  
Liabilities R$ 0 R$ 0