Other Comprehensive Income (Loss) - Components of OCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-Tax Amount	$ 4.6	$ (3.9)	$ (28.5)	$ (0.7)
Tax Benefit	0.2	0.0	(0.2)	0.0
After-Tax Amount	4.8	(3.9)	(28.7)	(0.7)
Defined benefit pension and other postretirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-Tax Amount			0.1
Tax Benefit			0.0
After-Tax Amount			0.1	0.0
Currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-Tax Amount	4.7	(3.9)	(28.7)	(0.6)
Tax Benefit	0.2	0.0	(0.2)	0.0
After-Tax Amount	4.9	$ (3.9)	(28.9)	(0.6)
Gain/loss hedging activities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Pre-Tax Amount	(0.1)		0.1	(0.1)
Tax Benefit	0.0		0.0	0.0
After-Tax Amount	$ (0.1)		$ 0.1	$ (0.1)