Investments in Affiliates Related Party Transactions (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transactions [Abstract]
Sales to equity investees	$ 67.6	$ 104.4	$ 80.6
Purchases from equity investees	42.3	31.2	$ 33.0
Accounts receivable from equity investees	1.5	1.9
Accounts payable to equity investees	$ 3.9	$ 6.4