Summary of Significant Accounting Policies - Changes in the Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	$ (3.0)	$ 5.7
Tax	(4.1)	5.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(7.1)	10.7	$ 1.9
Including cumulative effect adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax			(2.9)
Tax			4.8
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total			1.9
Pension and OPEB liability adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	8.9	5.0
Tax	(2.8)	(1.2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	6.1	3.8
Pension and OPEB liability adjustments | Including cumulative effect adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax			2.5
Tax			1.4
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total			3.9
Derivative instrument adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	11.9	(10.8)
Tax	(0.7)	1.2
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	11.2	(9.6)
Derivative instrument adjustments | Including cumulative effect adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax			(2.9)
Tax			0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total			(2.9)
Unrealized foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax	(23.8)	11.5
Tax	(0.6)	5.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	$ (24.4)	$ 16.5
Unrealized foreign currency translation adjustments | Including cumulative effect adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-tax			(2.5)
Tax			3.4
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total			$ 0.9