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Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2025
Disclosure Other Comprehensive Income Abstract  
Schedule of other comprehensive income financial assets measured at fair value
         
Thousand of Reais 2025
  Revaluation gains Revaluation losses Net recognized gains/losses Fair value
Debt Instruments        
Government securities 2,376,664 (1,250,469) 1,126,195 69,354,220
Private securities - (404) (404) -
Total 2,376,664 (1,250,873) 1,125,791 69,354,220
         
         
Thousand of Reais 2024
  Revaluation gains Revaluation losses Net recognized gains/losses Fair value
Debt Instruments        
Government securities 825,610 (4,604,296) (3,778,686) 86,437,770
Private securities 2,043,223 (429,081) 1,614,142 5,621,137
Total 2,868,833 (5,033,377) (2,164,544) 92,058,907
         
Thousand of Reais 2023
  Revaluation gains Revaluation losses Net recognized gains/losses Fair value
Debt Instruments        
Government securities 2,533,250 (1,437,728) 1,095,522 58,841,921
Private securities 10,864 (568,948) (558,084) 194,216
Total 2,544,114 (2,006,676) 537,438 59,036,137