Stockholders' Equity, Accumulated Other Comprehensive Income (Loss) and Noncontrolling Interest - Change in Stockholders' Equity (Deficit) (Parenthetical) (Detail) - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
|
| Equity [Abstract] | ||||
| Changes in defined benefit pension and other post-retirement benefit plans, tax | $ 0.1 | $ 0.1 | $ 0.6 | $ 0.2 |
| Share repurchases, tax | $ 0.0 | $ 0.0 | ||