Pension and Other Post-Retirement Benefit Plans Pension and Other Post-Retirement Benefit Plans (Accumulated Other Comprehensive Income As A Component Of Net Period Benefit Cost) (Details) - Pensions $ in Millions	Dec. 31, 2020 USD ($)
UNITED STATES
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ (16.8)
International
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	(4.0)
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	$ 1.2