Revenues Revenues - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 27.1
Number of Reportable Segments | segment	2
Increase (Decrease) in Contract with Customer, Liability	$ (5.3)	$ 35.6	$ 4.7
Contract With Customer Liability, Noncurrent, Recognition Period	5 years
Revenue, Remaining Performance Obligation, Amount	$ 130.0