Employee Incentive, Retirement, Deferred Compensation, and Career Achievement Plans - Changes in Projected Benefit Obligations (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] | ||
| Projected benefit obligation at beginning of year | $ 134 | $ 125 |
| Benefit cost | 17 | 17 |
| Actuarial loss (gain) | 12 | (8) |
| Projected benefit obligation at the end of year | $ 163 | $ 134 |