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Estimated Future Benefit Expected Payments (Detail)
$ in Millions
Dec. 31, 2018
USD ($)
Pension Plans, Defined Benefit | U.S. Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2019 $ 13.0
2020 14.0
2021 17.0
2022 19.0
2023 20.0
Years 2024-2028 123.0
Pension Plans, Defined Benefit | Non-U.S. Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2019 8.0
2020 8.0
2021 9.0
2022 9.0
2023 10.0
Years 2024-2028 63.0
Postretirement Benefits Other Than Pensions  
Defined Benefit Plan Disclosure [Line Items]  
2019 0.4
2020 0.4
2021 0.5
2022 0.5
2023 0.6
Years 2024-2028 $ 3.5