Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Primary term of contract	5 years
Performance obligations satisfied in prior period, amount recognized	$ 2.1
Revenue recognized in contract liability	0.2	$ 0.2
Contract assets recognized	$ 0.0