Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments		$ (6.8)	$ 2.0	$ 8.9
Equity method investments, share of net assets		30.1	$ 37.0
Impairment charge - equity method investment	$ 3.9	$ 3.9