SECURITIZATION TRANSACTIONS - Collateralized Debt (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Collateralized debt	$ 1,845	$ 1,475
Mercado Crédito I Brasil Fundo de Investimento Em Direitos Creditórios Não Padronizados
Debt Instrument [Line Items]
Collateralized debt	202
Mercado Crédito Fundo de Investimento Em Direitos Creditórios Não Padronizado
Debt Instrument [Line Items]
Collateralized debt	17
Olimpia Fundo de Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Collateralized debt	30
Mercado Crédito II Brasil Fundo De Investimento Em Direitos Creditórios Nao Padronizados
Debt Instrument [Line Items]
Collateralized debt	220
Mercado Crédito II Brasil Fundo De Investimento Em Direitos Creditórios Nao Padronizados
Debt Instrument [Line Items]
Collateralized debt	73
Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Collateralized debt	192
Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Collateralized debt	96
Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Collateralized debt	38
Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Collateralized debt	19
Seller II Fundo De Investimento Em Direitos Creditórios Segmento Meios De Pagamento De Rsponsabilidade Limitada
Debt Instrument [Line Items]
Collateralized debt	183
Mercado Crédito Consumo XXX
Debt Instrument [Line Items]
Collateralized debt	11
Mercado Crédito Consumo XXXI
Debt Instrument [Line Items]
Collateralized debt	16
Mercado Crédito Consumo XXXII
Debt Instrument [Line Items]
Collateralized debt	18
Mercado Crédito Consumo XXXIII
Debt Instrument [Line Items]
Collateralized debt	24
Mercado Crédito Consumo XXXIV
Debt Instrument [Line Items]
Collateralized debt	21
Mercado Crédito Consumo XXXV
Debt Instrument [Line Items]
Collateralized debt	23
Mercado Crédito XX
Debt Instrument [Line Items]
Collateralized debt	1
Mercado Crédito XXI
Debt Instrument [Line Items]
Collateralized debt	5
Mercado Crédito XXII
Debt Instrument [Line Items]
Collateralized debt	6
Mercado Crédito XXIII
Debt Instrument [Line Items]
Collateralized debt	15
Mercado Crédito XXIV
Debt Instrument [Line Items]
Collateralized debt	14
Mercado Crédito XXV
Debt Instrument [Line Items]
Collateralized debt	30
Mercado Crédito XXVI
Debt Instrument [Line Items]
Collateralized debt	34
Mercado Credito XXVII
Debt Instrument [Line Items]
Collateralized debt	28
Fideicomiso de administración y fuente de pago CIB/3756
Debt Instrument [Line Items]
Collateralized debt	214
Fideicomiso de administración y fuente de pago CIB/3369
Debt Instrument [Line Items]
Collateralized debt	31
Fideicomiso de administración y fuente de pago CIB/3369
Debt Instrument [Line Items]
Collateralized debt	231
Fideicomiso Irrevocable de Administración y Fuente de Pago número CIB/4372
Debt Instrument [Line Items]
Collateralized debt	$ 53
CDI | Mercado Crédito I Brasil Fundo de Investimento Em Direitos Creditórios Não Padronizados
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
CDI | Mercado Crédito Fundo de Investimento Em Direitos Creditórios Não Padronizado
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
CDI | Olimpia Fundo de Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
CDI | Mercado Crédito II Brasil Fundo De Investimento Em Direitos Creditórios Nao Padronizados
Debt Instrument [Line Items]
Basis spread on variable rate	2.35%
CDI | Mercado Crédito II Brasil Fundo De Investimento Em Direitos Creditórios Nao Padronizados
Debt Instrument [Line Items]
Basis spread on variable rate	5.25%
CDI | Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Basis spread on variable rate	1.60%
CDI | Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Basis spread on variable rate	1.80%
CDI | Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Basis spread on variable rate	1.40%
CDI | Seller Fundo De Investimento Em Direitos Creditórios
Debt Instrument [Line Items]
Basis spread on variable rate	1.60%
CDI | Seller II Fundo De Investimento Em Direitos Creditórios Segmento Meios De Pagamento De Rsponsabilidade Limitada
Debt Instrument [Line Items]
Basis spread on variable rate	0.85%
BADLAR Rate | Mercado Crédito Consumo XXX
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito Consumo XXXI
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito Consumo XXXII
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito Consumo XXXIII
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito Consumo XXXIV
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito Consumo XXXV
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito XXI
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito XXII
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito XXIII
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito XXIV
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito XXV
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Crédito XXVI
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Mercado Credito XXVII
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
BADLAR Rate | Minimum | Mercado Crédito Consumo XXX
Debt Instrument [Line Items]
Effective interest rate	75.00%
BADLAR Rate | Minimum | Mercado Crédito Consumo XXXI
Debt Instrument [Line Items]
Effective interest rate	45.00%
BADLAR Rate | Minimum | Mercado Crédito Consumo XXXII
Debt Instrument [Line Items]
Effective interest rate	25.00%
BADLAR Rate | Minimum | Mercado Crédito Consumo XXXIII
Debt Instrument [Line Items]
Effective interest rate	5.00%
BADLAR Rate | Minimum | Mercado Crédito Consumo XXXIV
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Minimum | Mercado Crédito Consumo XXXV
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Minimum | Mercado Crédito XX
Debt Instrument [Line Items]
Effective interest rate	100.00%
BADLAR Rate | Minimum | Mercado Crédito XXI
Debt Instrument [Line Items]
Effective interest rate	45.00%
BADLAR Rate | Minimum | Mercado Crédito XXII
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Minimum | Mercado Crédito XXIII
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Minimum | Mercado Crédito XXIV
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Minimum | Mercado Crédito XXV
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Minimum | Mercado Crédito XXVI
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Minimum | Mercado Credito XXVII
Debt Instrument [Line Items]
Effective interest rate	15.00%
BADLAR Rate | Maximum | Mercado Crédito Consumo XXX
Debt Instrument [Line Items]
Effective interest rate	155.00%
BADLAR Rate | Maximum | Mercado Crédito Consumo XXXI
Debt Instrument [Line Items]
Effective interest rate	125.00%
BADLAR Rate | Maximum | Mercado Crédito Consumo XXXII
Debt Instrument [Line Items]
Effective interest rate	80.00%
BADLAR Rate | Maximum | Mercado Crédito Consumo XXXIII
Debt Instrument [Line Items]
Effective interest rate	60.00%
BADLAR Rate | Maximum | Mercado Crédito Consumo XXXIV
Debt Instrument [Line Items]
Effective interest rate	60.00%
BADLAR Rate | Maximum | Mercado Crédito Consumo XXXV
Debt Instrument [Line Items]
Effective interest rate	60.00%
BADLAR Rate | Maximum | Mercado Crédito XX
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Effective interest rate	170.00%
BADLAR Rate | Maximum | Mercado Crédito XXI
Debt Instrument [Line Items]
Effective interest rate	125.00%
BADLAR Rate | Maximum | Mercado Crédito XXII
Debt Instrument [Line Items]
Effective interest rate	70.00%
BADLAR Rate | Maximum | Mercado Crédito XXIII
Debt Instrument [Line Items]
Effective interest rate	60.00%
BADLAR Rate | Maximum | Mercado Crédito XXIV
Debt Instrument [Line Items]
Effective interest rate	60.00%
BADLAR Rate | Maximum | Mercado Crédito XXV
Debt Instrument [Line Items]
Effective interest rate	60.00%
BADLAR Rate | Maximum | Mercado Crédito XXVI
Debt Instrument [Line Items]
Effective interest rate	60.00%
BADLAR Rate | Maximum | Mercado Credito XXVII
Debt Instrument [Line Items]
Effective interest rate	60.00%
Diario Oficial | Fideicomiso de administración y fuente de pago CIB/3756
Debt Instrument [Line Items]
Effective interest rate	2.35%
Diario Oficial | Fideicomiso de administración y fuente de pago CIB/3369
Debt Instrument [Line Items]
Effective interest rate	7.00%
Diario Oficial | Fideicomiso de administración y fuente de pago CIB/3369
Debt Instrument [Line Items]
Effective interest rate	2.80%
Diario Oficial | Fideicomiso Irrevocable de Administración y Fuente de Pago número CIB/4372
Debt Instrument [Line Items]
Effective interest rate	2.50%