v3.26.1
Fair Value Accounting - Unobservable Inputs (Details)
Mar. 31, 2026
USD ($)
yr
Dec. 31, 2025
USD ($)
yr
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets acquired through foreclosure $ 123,000,000 $ 137,000,000
Fair Value, Nonrecurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI 409,000,000 395,000,000
Other assets acquired through foreclosure 123,000,000 137,000,000
Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI 409,000,000 395,000,000
Other assets acquired through foreclosure $ 123,000,000 $ 137,000,000
Minimum | Third party appraisal | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Collateral Method    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 6.00% 6.00%
Minimum | Third party appraisal | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Other Assets | Valuation Technique, Collateral Method    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets acquired through foreclosure, measurement input 1.00% 1.00%
Minimum | Discount rate | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Discounted Cash Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 3.00% 3.00%
Minimum | Scheduled cash collections | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Discounted Cash Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 0.00% 0.00%
Minimum | Proceeds from non-real estate collateral | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Discounted Cash Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 0.00% 0.00%
Minimum | Option Adjusted Spread    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.0327 0.0283
Minimum | Conditional Prepayment Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.058 0.061
Minimum | Recapture rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.000 0.000
Minimum | Servicing Fee Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.00250 0.00250
Minimum | Cost to service    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 77 77
Minimum | Lifetime liquidation probability    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFS, measurement input 0.021 0.016
Minimum | Servicing fee multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative asset, measurement input 4.7 4.7
Minimum | Pull-through rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative asset, measurement input 0.80 0.74
Minimum | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.466 0.403
Minimum | Risk-free interest rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.037 0.035
Minimum | Time to expiration (in years)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input | yr 1.0 1.0
Maximum | Third party appraisal | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Collateral Method    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 10.00% 10.00%
Maximum | Third party appraisal | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Other Assets | Valuation Technique, Collateral Method    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other assets acquired through foreclosure, measurement input 6.00% 6.00%
Maximum | Discount rate | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Discounted Cash Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 8.00% 8.00%
Maximum | Scheduled cash collections | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Discounted Cash Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 20.00% 20.00%
Maximum | Proceeds from non-real estate collateral | Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3) | Loans and Finance Receivables | Valuation Technique, Discounted Cash Flow    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFI, measurement input 70.00% 70.00%
Maximum | Option Adjusted Spread    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.0458 0.0317
Maximum | Conditional Prepayment Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.130 0.141
Maximum | Recapture rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.550 0.550
Maximum | Servicing Fee Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.00565 0.00565
Maximum | Cost to service    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 83 83
Maximum | Lifetime liquidation probability    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFS, measurement input 0.125 0.107
Maximum | Servicing fee multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative asset, measurement input 7.0 6.5
Maximum | Pull-through rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative asset, measurement input 1 1
Maximum | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 1.688 1.804
Maximum | Risk-free interest rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.044 0.041
Maximum | Time to expiration (in years)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input | yr 10.0 10.0
Weighted Average | Option Adjusted Spread    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.0377 0.0316
Weighted Average | Conditional Prepayment Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.103 0.110
Weighted Average | Recapture rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.251 0.255
Weighted Average | Servicing Fee Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 0.00393 0.00381
Weighted Average | Cost to service    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Servicing asset, measurement input 79 79
Weighted Average | Lifetime liquidation probability    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans HFS, measurement input 0.067 0.046
Weighted Average | Servicing fee multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative asset, measurement input 5.7 5.5
Weighted Average | Pull-through rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative asset, measurement input 0.910 0.920
Weighted Average | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.781 0.747
Weighted Average | Risk-free interest rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input 0.039 0.036
Weighted Average | Time to expiration (in years)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity warrants, measurement input | yr 2.8 2.9