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Postretirement Benefit Plans - Estimated Future Benefit Payments (Detail)
$ in Millions
Dec. 31, 2021
USD ($)
Other Postretirement Benefits Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 8.5
2023 8.1
2024 7.8
2025 7.5
2026 7.0
2027 - 2031 31.1
United States | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 0.9
2023 0.9
2024 0.9
2025 0.9
2026 0.9
2027 - 2031 4.4
International Plan [Member] | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 4.7
2023 3.7
2024 3.9
2025 3.5
2026 3.7
2027 - 2031 $ 18.7