v3.26.1
Fair Value of Financial Assets and Liabilities - Residual Interests in Structured Transactions, Significant Unobservable Inputs (Details)
Jun. 30, 2026
Jun. 30, 2025
Discount Rate | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.2000 0.2000
Discount Rate | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.2000 0.2000
Discount Rate | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.2000 0.2000
Default Rate | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.1042 0.0888
Default Rate | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.1042 0.0888
Default Rate | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.1042 0.0888
Prepayment Rate | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.4561 0.4885
Prepayment Rate | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.4561 0.4885
Prepayment Rate | Weighted Average    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Residual interests in structured transactions, measurement input 0.4561 0.4885