Finance Receivables - Schedule of Modified Financing Receivables Financial Effects (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Personal Loans | ||||
| Financing Receivable, Modified [Line Items] | ||||
| Weighted-average interest rate reduction | 22.07% | 19.35% | 21.55% | 17.95% |
| Weighted-average term extension (months) | 29 months | 23 months | 29 months | 24 months |
| Principal/interest forgiveness | $ 12 | $ 11 | $ 31 | $ 28 |
| Auto Finance | ||||
| Financing Receivable, Modified [Line Items] | ||||
| Weighted-average interest rate reduction | 13.17% | 12.24% | 13.61% | 12.79% |
| Weighted-average term extension (months) | 15 months | 13 months | 17 months | 15 months |
| Principal/interest forgiveness | $ 0 | $ 0 | $ 1 | $ 1 |