Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	$ (104.7)
Current-period change	9.9
Balance as of March 31, 2017	(94.8)
Deferred tax assets in accumulated other comprehensive loss, pension liabilities	13.5	$ 14.9
Foreign Currency Transaction (Loss) Gain
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	(79.9)
Current-period change	7.6
Balance as of March 31, 2017	(72.3)
Pension and Postretirement Benefit Adjustments, Net of Tax
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	(24.8)
Current-period change	2.3
Balance as of March 31, 2017	$ (22.5)