Restructuring Charges 2020 Plan Restructuring Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	$ 0.3	$ 0.3
Lease impairment costs	1.2	5.3
Other restructuring costs	0.1	1.0
Restructuring charges	1.6	$ 6.6
Restructuring Reserve			$ 2.3
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	1.3		2.3
Lease impairment costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0		0.0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	0.0		$ 0.0
Non-cash Items [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	0.0
Restructuring charges	0.0
Cash Payments [Member]
Restructuring Cost and Reserve [Line Items]
Severance and termination costs	1.3
Restructuring charges	$ 1.3