Derivatives - Net Change in Fair Value of Credit Derivatives Gains (Losses) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Credit Derivatives | ||||
| Fair value gains (losses) on derivatives | $ 10 | $ 5 | $ 17 | $ 110 |
| LBIE vs. AG Financial Products | Positive Outcome of Litigation | Settled Litigation | AG Financial Products Inc. | ||||
| Credit Derivatives | ||||
| Litigation settlement, gain | 103 | |||
| Credit | ||||
| Credit Derivatives | ||||
| Realized gains (losses) and other settlements | 1 | 2 | 4 | 107 |
| Net unrealized gains (losses) | 1 | 3 | 1 | 3 |
| Fair value gains (losses) on derivatives | 2 | 5 | 5 | 110 |
| Cross-currency swaps | ||||
| Credit Derivatives | ||||
| Fair value gains (losses) on derivatives | 3 | 0 | (1) | 0 |
| Interest rate swaps | ||||
| Credit Derivatives | ||||
| Fair value gains (losses) on derivatives | (1) | 0 | (2) | 0 |
| Inflation swaps | ||||
| Credit Derivatives | ||||
| Fair value gains (losses) on derivatives | 4 | 0 | 6 | 0 |
| Funds withheld - embedded derivative | ||||
| Credit Derivatives | ||||
| Fair value gains (losses) on derivatives | $ 2 | $ 0 | $ 9 | $ 0 |