Revenues (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract assets (non-current)	$ 1.3	$ 1.0
Contract liabilities	10.7	10.3
Contract liabilities	187.1	$ 172.2
Revenues recognized	$ 14.0