Revenue Recognition - Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Receivables from contracts with customers, net of allowances	$ 2,585.8	$ 2,354.3
Increase (decrease) in receivables	231.5
Contract with Customer, Liability	213.5	$ 492.7
Increase (decrease) in liabilities	$ (279.2)