Deferred Compensation - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Deferred Equity Participation Plan (DEPP) | ||
| Investments And Employee Deferred Compensation Plan [Line Items] | ||
| Vesting period, years | 1 year | |
| Unearned deferred compensation, value | $ 123 | $ 81 |
| Unearned deferred compensation, shares (in shares) | 2.0 | 1.8 |
| Total intrinsic value of unvested equity based awards | $ 447 | $ 596 |
| Deferred Cash Participation Plan (DCPP) | ||
| Investments And Employee Deferred Compensation Plan [Line Items] | ||
| Vesting period, years | 5 years |