Derivatives and Hedging Activities - Summary of Information About CVA and FVA (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
| CVA, net of hedges | $ 153 | $ 139 |
| FVA, net of hedges | (90) | (2) |
| Total | $ 63 | $ 137 |