Revenues Contract Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, Gross, Noncurrent	$ 1.2	$ 1.0
Deferred revenue	8.8	12.0
Contract liabilities	144.7	$ 65.4
Contract with Customer, Liability, Revenue Recognized	$ 13.3