Fair Value - Fair Value Measurement Inputs and Valuation Techniques (Details) - Residual Interests	Mar. 31, 2026 year	Dec. 31, 2025 year
Recovery rate on defaulted receivables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.5000	0.5000
Recovery rate on defaulted receivables \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.5000	0.5000
Prepayment speed
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.0140	0.0140
Prepayment speed \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.0140	0.0140
Expected cumulative lifetime losses \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.0206	0.0201
Expected cumulative lifetime losses \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.0338	0.0321
Expected cumulative lifetime losses \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.0277	0.0247
Weighted-average life (in years) \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.81	0.96
Weighted-average life (in years) \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	2.35	2.46
Weighted-average life (in years) \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	1.81	1.87
Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.1500	0.1500
Discount rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities, available-for-sale, measurement input	0.1500	0.1500