Retirement Plans - Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current year net actuarial loss (gain)	$ (2.2)	$ 2.4	$ 1.8
Current year prior service cost (credit)	0.3	0.3	0.0
Amortization of net actuarial (loss) gain and prior service (cost) credit	(0.2)	(0.2)	(0.1)
Settlement and curtailment (charges) income, net	0.0	(0.1)	0.0
Total recognized in other comprehensive (income) loss, before taxes	(2.1)	2.4	1.7
Total recognized in other comprehensive (income) loss, after taxes	(1.6)	1.8	1.3
Pensions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current year net actuarial loss (gain)	(2.1)	2.3	1.7
Current year prior service cost (credit)	0.3	0.3	0.0
Amortization of net actuarial (loss) gain and prior service (cost) credit	(0.2)	(0.2)	(0.1)
Settlement and curtailment (charges) income, net	0.0	(0.1)	0.0
Total recognized in other comprehensive (income) loss, before taxes	(2.0)	2.3	1.6
Total recognized in other comprehensive (income) loss, after taxes	(1.5)	1.7	1.2
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Current year net actuarial loss (gain)	(0.1)	0.1	0.1
Current year prior service cost (credit)	0.0	0.0	0.0
Amortization of net actuarial (loss) gain and prior service (cost) credit	0.0	0.0	0.0
Settlement and curtailment (charges) income, net	0.0	0.0	0.0
Total recognized in other comprehensive (income) loss, before taxes	(0.1)	0.1	0.1
Total recognized in other comprehensive (income) loss, after taxes	$ (0.1)	$ 0.1	$ 0.1