Revenue Recognition Contract Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Contract Assets (Non-current)	$ 1.1	$ 1.2
Contract Liabilities (Current)	9.0	8.8
Contract Liabilities (Non-current)	151.3	$ 144.7
Contract with Customer, Liability, Revenue Recognized	$ 3.8