Equity Method Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity Method Investments [Abstract]
Income From Equity Method Investments	$ 2.0	$ 8.9	$ 3.5
Equity method investments, share of net assets	$ 37.0	$ 42.9