Property, Plant and Equipment (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 02, 2021	Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation	$ 9.5	$ 50.9		$ 28.6
Fully Depreciated Assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Average			36 months
Assets, Fair Value Disclosure		282.1	$ 282.1
Depreciation, Remainder Of Year 1		203.8	203.8
Depreciation, Year 2		86.9	86.9
Depreciation, Year 3		$ 50.0	$ 50.0