Income Taxes - Schedule of Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Tax at statutory U.S. tax rate	$ 10.0	$ 13.9
State income taxes, net of federal benefit	1.0	0.7
Net effect of international operations	1.2	(0.8)
Federal rate reduction effect on deferred tax assets	(104.9)	0.0
Valuation allowances	91.8	(14.3)
Tax on unremitted earnings of foreign subsidiaries	5.1	3.1
U.S. tax on foreign earnings	(0.2)	(0.8)
Stock-based compensation	(0.9)	(1.6)
Uncertain tax positions	0.0	(0.1)
Goodwill impairment	(1.4)	0.0
Minimum tax credit refundable	2.2	0.0
Reclassification to discontinued operations and other	1.9	(0.2)
Income tax (provision) benefit	$ 5.8	$ (0.1)