v3.25.2
Fair Value of Financial Instruments - Schedule of Fair Value Assets Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Assets:    
Beneficial interests in securitizations $ 466 $ 464
Purchase price adjustment receivables 2 2
Root Warrants    
Assets:    
Root Warrants 243 120
Money market funds    
Assets:    
Money market funds 718 1,154
Level 1    
Assets:    
Beneficial interests in securitizations 0 0
Purchase price adjustment receivables 0 0
Level 1 | Root Warrants    
Assets:    
Root Warrants 0 0
Level 1 | Money market funds    
Assets:    
Money market funds 718 1,154
Level 2    
Assets:    
Beneficial interests in securitizations 0 0
Purchase price adjustment receivables 0 0
Level 2 | Root Warrants    
Assets:    
Root Warrants 0 0
Level 2 | Money market funds    
Assets:    
Money market funds 0 0
Level 3    
Assets:    
Beneficial interests in securitizations 466 464
Purchase price adjustment receivables 2 2
Level 3 | Root Warrants    
Assets:    
Root Warrants 243 120
Level 3 | Money market funds    
Assets:    
Money market funds $ 0 $ 0