v3.26.1
Post-employment benefits - Schedule of Change in Net Amount Recognized in Balance Sheet (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period R$ (2,060) R$ (2,429)
Amounts recognized in income (1+2+3+4) (295) (153)
1 - Cost of current service (24) (29)
3 - Net interest (205) (188)
4 - Other revenues and expenses (66) 64
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) 3 (227)
5 - Effects on asset ceiling (305) 296
6 - Remeasurements 315 (499)
Changes in demographic assumptions 151  
Changes in financial assumptions (380) 3,288
Experience of the plan 544 (3,787)
7 - Exchange variation (7) (24)
Other (8+9+10) 335 749
9 - Benefits paid 83 191
10 - Contributions and investments from sponsor 252 558
Amounts at the end of the period (2,017) (2,060)
Amount recognized in Assets 256 301
Amount recognized in Liabilities 2,273 (2,361)
BD and CV plans    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period (1,782) (1,966)
Amounts recognized in income (1+2+3+4) (208) (186)
1 - Cost of current service (24) (29)
3 - Net interest (184) (157)
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) 4 (188)
5 - Effects on asset ceiling (300) 290
6 - Remeasurements 311 (454)
Changes in demographic assumptions 151  
Changes in financial assumptions (384) 3,197
Experience of the plan 544 (3,651)
7 - Exchange variation (7) (24)
Other (8+9+10) 252 558
10 - Contributions and investments from sponsor 252 558
Amounts at the end of the period (1,734) (1,782)
Amount recognized in Assets 13 17
Amount recognized in Liabilities 1,747 (1,799)
BD and CV plans | Net asset    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period 21,490 23,754
Amounts recognized in income (1+2+3+4) 2,393 2,226
3 - Net interest 2,393 2,226
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) 749 (3,240)
6 - Remeasurements 762 (3,244)
Experience of the plan 762 (3,244)
7 - Exchange variation (13) 4
Other (8+9+10) (1,695) (1,250)
9 - Benefits paid (1,947) (1,808)
10 - Contributions and investments from sponsor 252 558
Amounts at the end of the period 22,937 21,490
BD and CV plans | Actuarial liabilities    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period (19,035) (21,590)
Amounts recognized in income (1+2+3+4) (2,108) (2,015)
1 - Cost of current service (24) (29)
3 - Net interest (2,084) (1,986)
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) (445) 2,762
6 - Remeasurements (451) 2,790
Changes in demographic assumptions 151  
Changes in financial assumptions (384) 3,197
Experience of the plan (218) (407)
7 - Exchange variation 6 (28)
Other (8+9+10) 1,947 1,808
9 - Benefits paid 1,947 1,808
Amounts at the end of the period (19,641) (19,035)
BD and CV plans | Asset ceiling    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period (4,237) (4,130)
Amounts recognized in income (1+2+3+4) (493) (397)
3 - Net interest (493) (397)
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) (300) 290
5 - Effects on asset ceiling (300) 290
Amounts at the end of the period (5,030) (4,237)
CD plans    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period 284 313
Amounts recognized in income (1+2+3+4) (26) 98
3 - Net interest 40 34
4 - Other revenues and expenses (66) 64
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) (15) (127)
5 - Effects on asset ceiling (5) 6
6 - Remeasurements (10) (133)
Experience of the plan (10) (133)
Amounts at the end of the period 243 284
Amount recognized in Assets 243 284
CD plans | Net asset    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period 365 393
Amounts recognized in income (1+2+3+4) (16) 105
3 - Net interest 50 41
4 - Other revenues and expenses (66) 64
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) (10) (133)
6 - Remeasurements (10) (133)
Experience of the plan (10) (133)
Amounts at the end of the period 339 365
CD plans | Asset ceiling    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period (81) (80)
Amounts recognized in income (1+2+3+4) (10) (7)
3 - Net interest (10) (7)
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) (5) 6
5 - Effects on asset ceiling (5) 6
Amounts at the end of the period (96) (81)
Other post-employment benefits    
Disclosure of defined benefit plans [line items]    
Amounts at the beginning of the period (562) (776)
Amounts recognized in income (1+2+3+4) (61) (65)
3 - Net interest (61) (65)
Amount recognized in stockholders' equity - other comprehensive income (5+6+7) 14 88
6 - Remeasurements 14 88
Changes in financial assumptions 4 91
Experience of the plan 10 (3)
Other (8+9+10) 83 191
9 - Benefits paid 83 191
Amounts at the end of the period (526) (562)
Amount recognized in Liabilities R$ 526 R$ (562)