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Pension and Postretirement Benefits (Expected Benefit Payments) (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Postretirement Medical Benefits  
Defined Benefit Plan Disclosure [Line Items]  
Expected Payment, 2020 $ 2.4
Expected Payment, 2021 2.2
Expected Payment, 2022 2.0
Expected Payment, 2023 1.8
Expected Payment, 2024 1.6
Expected Payment, 2025-2029 6.1
United States | Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
Expected Payment, 2020 43.3
Expected Payment, 2021 42.2
Expected Payment, 2022 42.8
Expected Payment, 2023 41.2
Expected Payment, 2024 42.4
Expected Payment, 2025-2029 196.3
Foreign Plan | Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
Expected Payment, 2020 17.6
Expected Payment, 2021 18.1
Expected Payment, 2022 18.1
Expected Payment, 2023 19.1
Expected Payment, 2024 18.7
Expected Payment, 2025-2029 $ 100.3