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Fair Value of Financial Instruments - Schedule of Reconciliation Level Three, Beneficial Interests in Securitizations (Details) - Variable Interest Entity, Not Primary Beneficiary - Level 3 - Fair Value, Measurements, Recurring - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Opening balance | $ 466 | $ 421 | $ 464 | $ 366
Received in securitization transactions | 71 | 86 | 173 | 228
Payments received | (55) | (45) | (159) | (137)
Change in fair value | 4 | 1 | 8 | 15
Sales of beneficial interests | 0 | 0 | 0 | (9)
Ending balance | $ 486 | $ 463 | $ 486 | $ 463

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