Employee benefit plans - Components of Net Periodic Benefit Cost (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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| Net periodic pension cost (income): | ||||
| Service cost | $ 2.5 | $ 2.9 | ||
| Interest cost | 11.1 | 10.6 | ||
| Expected return on plan assets | (10.6) | (10.8) | ||
| Recognized actuarial losses | 0.9 | 1.0 | ||
| Total | 3.9 | $ 3.7 | ||
| Expected contributions for pension plans in 2026 | $ 17.0 | $ 17.0 | ||
| Foreign plan | Defined benefit pension plans | ||||
| Net periodic pension cost (income): | ||||
| Service cost | 1.2 | $ 1.5 | ||
| Interest cost | 5.5 | 5.4 | ||
| Expected return on plan assets | (5.3) | (5.6) | ||
| Recognized actuarial losses | 0.5 | 0.6 | ||
| Total | $ 1.9 | $ 1.9 | ||
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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 contributions received and expected to be received by defined benefit plan from employer in current fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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