Impairment (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Goodwill, Impaired [Abstract]
Impairment	$ 6.3	$ 0.0	$ 6.3
Other assets, current	2.5		2.5
Other assets	$ 10.2		$ 10.2