Investment Securities - Gross Realized Gains (Losses) on Sales of AFS Securities (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| AFS securities | ||||
| Gross realized gains | $ 10 | $ 1 | $ 18 | $ 22 |
| Gross realized (losses) | (2) | (1) | (5) | (1) |
| Total | $ 8 | $ 0 | $ 13 | $ 21 |