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Risk and Capital Management (Details 8) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Carrying value of the assets R$ 490,420 R$ 452,496
Fair value of collateral 1,269,860 1,247,022
Carrying value of the assets 56,297 43,232
Fair value of collateral 43,535 31,992
Micro Small and Medium Companies and Corporates [Member]    
IfrsStatementLineItems [Line Items]    
Carrying value of the assets 173,007 170,334
Fair value of collateral 614,178 634,871
Carrying value of the assets 41,395 32,436
Fair value of collateral 36,233 26,933
Foreign Loans [Member] | Foreign countries [member]    
IfrsStatementLineItems [Line Items]    
Carrying value of the assets 175,517 168,968
Fair value of collateral 319,085 330,020
Carrying value of the assets 11,817 9,782
Fair value of collateral 4,441 4,152
Individuals [member]    
IfrsStatementLineItems [Line Items]    
Carrying value of the assets 141,896 113,194
Fair value of collateral 336,597 282,131
Carrying value of the assets 3,085 1,014
Fair value of collateral 2,861 907
Individuals [member] | Vehicles [member]    
IfrsStatementLineItems [Line Items]    
Carrying value of the assets 29,613 26,941
Fair value of collateral 70,901 68,275
Carrying value of the assets 1,610 368
Fair value of collateral 1,463 318
Individuals [member] | Personal loan [Member]    
IfrsStatementLineItems [Line Items]    
Carrying value of the assets 2,971 2,436
Fair value of collateral 11,106 8,338
Carrying value of the assets 1,469 639
Fair value of collateral 1,394 583
Individuals [member] | Mortgages [member]    
IfrsStatementLineItems [Line Items]    
Carrying value of the assets 109,312 83,817
Fair value of collateral 254,590 205,518
Carrying value of the assets 6 7
Fair value of collateral R$ 4 R$ 6