Equity - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ (71.3)	$ (42.3)
Translation adjustments	(0.2)	(17.9)
Balance at end of period	(71.5)	(60.2)
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(76.8)	(47.7)
Translation adjustments	(0.2)	(17.9)
Balance at end of period	(77.0)	(65.6)
Pension and Other Post-Retirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	5.2	5.2
Translation adjustments	0.0	0.0
Balance at end of period	5.2	5.2
Unrealized Gain in Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	0.3	0.2
Translation adjustments	0.0	0.0
Balance at end of period	$ 0.3	$ 0.2