Income Taxes - Components of Income Tax Expense (Details 5) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Remeasurement of deferred taxes for U.S. tax legislation		$ 0.0	$ 0.0	$ (4.3)
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense				24.3
Undistributed Earnings of Foreign Subsidiaries		11.4
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			(5.3)
Current:
Federal		0.2	(0.5)	(4.5)
State		(0.1)	(0.3)	0.3
Foreign		5.1	2.1	2.4
Deferred:
Federal		(0.1)	(5.3)	0.7
State		0.0	0.0	0.1
Deferred Foreign Income Tax Expense (Benefit)		2.5	(2.2)	(0.4)
Amount allocated to other comprehensive income		(1.4)	0.0	0.0
Change in valuation allowance on beginning-of-the-year deferred tax assets		0.0	0.0	(0.8)
Income tax expense (benefit)		$ 6.2	$ (6.2)	$ (2.2)