Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ 0.0	$ 0.6	$ 0.3	$ 2.1
Lease impairment costs	0.0	(0.9)	5.3	(1.1)
Other restructuring costs	(0.1)	0.1	0.9	0.1
Restructuring charges	(0.1)	(0.2)	6.5	1.1
Severance and termination costs	0.0	0.6	0.3	2.1
Lease impairment costs	0.0	(0.9)	5.3	(1.1)
Other restructuring costs	(0.1)	0.1	0.9	0.1
Restructuring charges	$ (0.1)	$ (0.2)	$ 6.5	$ 1.1