Pension plans - Defined contribution pension plans - Narrative (Detail) - USD ($) $ in Billions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Defined Contribution Plan [Abstract] | |||
| Contributions to defined contribution plans | $ 1.4 | $ 1.3 | $ 1.1 |