Retirement Plans - Components of Net Pension Plan Expense (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Retirement Benefits [Abstract] | ||||
| Interest cost | $ 0.3 | $ 2.5 | $ 0.6 | $ 5.1 |
| Expected return on assets | 0.0 | (2.5) | 0.0 | (5.0) |
| Amortization, net | 0.0 | 0.4 | 0.1 | 0.8 |
| Net pension plan expense | $ 0.3 | $ 0.4 | $ 0.7 | $ 0.9 |
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- Definition Defined benefit plan net periodic benefit cost less pension plan settlement charges. No definition available.
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- References No definition available.
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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