Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income tax (benefit) expense computed at U.S. federal statutory rate	$ (6.4)	$ 2.5	$ (5.5)
Foreign withholding tax	4.2	7.0	3.7
State and local income taxes, net of federal benefit	0.1	0.2	(0.6)
Foreign tax differential	(1.0)	(3.1)	(2.3)
Change in tax rates	0.3	0.0	(3.2)
Change in valuation allowances	15.7	6.6	7.8
Uncertain tax positions	6.5	0.4	0.3
Reduction in valuation allowances for business combination	(4.0)	0.0	0.0
Dividend elimination and subpart F	2.4	8.7	6.7
Acquisition expenditures capitalized for tax	0.0	0.0	1.3
Other permanent differences	2.4	2.6	1.2
Tax credits	(2.3)	(1.7)	(1.2)
Adjust deferred taxes	(1.4)	(0.5)	0.6
Share-based compensation	3.0	0.3	0.4
Other	0.9	(1.0)	(0.3)
Total income tax expense	$ 20.4	$ 22.0	$ 8.9