Derivatives and Hedging Activities - Summary of Information About CVA and FVA (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||||
| CVA, net of hedges | $ 70 | $ 31 | $ 223 | $ 170 |
| FVA, net of hedges | 76 | 31 | (14) | 29 |
| Total | $ 146 | $ 62 | $ 209 | $ 199 |