Revenues - Narrative, Remaining Performance Obligation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 7.5
Unfulfilled performance obligations	2,344.0
Contract With Customer, Liability, Revenue Recognized, Billed Prior Period	0.7	$ 0.6
Contract With Customer, Asset, Revenue Recognized	0.2
Shortfall Payments
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	$ 0.3