Supplemental Consolidated Cash and Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Cash	$ 48.3		$ 133.0
Restricted cash	0.8		0.7
Total cash and restricted cash reported in the Consolidated Balance Sheets	49.1	$ 39.4	$ 133.7	$ 22.3
Interest	0.6	0.6
Income taxes	$ (0.3)	$ (0.1)