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Pension Plans and Other Postretirement Benefits Current Forecast of Benefit Payments which Reflect Expected Future Service (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Other Postretirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2020 $ 4.2
2021 4.0
2022 3.9
2023 3.9
2024 3.8
2025-2029 17.5
U.S. Plans | Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2020 42.3
2021 47.8
2022 48.4
2023 48.9
2024 49.0
2025-2029 240.9
Foreign Plans | Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
2020 10.6
2021 10.0
2022 9.5
2023 12.3
2024 10.4
2025-2029 $ 54.6