COVID-19 Repositioning Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
COVID-19 Repositioning Costs [Abstract]
COVID-19 repositioning costs	$ 0.0	$ 0.0	$ 0.0	$ 277.9
Repositioning Liabilities [Roll Forward]
Repositioning Liabilities, January 1, 2021			83.8
Repositioning Liabilities, Payments			(34.6)
Repositioning Liabilities, September 30, 2021	$ 49.2		$ 49.2