Benefit Plans Benefit Plans - Future Benefit Payments (Details) $ in Millions	Dec. 31, 2020 USD ($)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Amount of net loss (gain)	$ 0.3
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
2021, gross	0.9
2022, gross	0.9
2023, gross	0.8
2024, gross	0.8
2025, gross	0.8
2026-2029, gross	3.9
2021, net	0.8
2022, net	0.8
2023, net	0.8
2024, net	0.8
2025, net	0.8
2026-2029, net	3.7
U.S. Plans | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Amount of net loss (gain)	9.0
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
2021	29.4
2022	30.1
2023	30.7
2024	31.2
2025	31.7
2026-2029	162.3
Foreign Plan [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Amount of net loss (gain)	0.1
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
2021	26.3
2022	23.1
2023	25.2
2024	24.0
2025	27.1
2026-2029	$ 132.3