Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Schedule of accumulated other comprehensive loss
Balance at the beginning of the year	$ (99.7)
Current-year change	(5.0)
Balance at the end of the year	(104.7)
Deferred tax assets in accumulated other comprehensive loss, pension liabilities	14.9	$ 15.6
Foreign Currency Transaction Loss
Schedule of accumulated other comprehensive loss
Balance at the beginning of the year	(74.2)
Current-year change	(5.7)
Balance at the end of the year	(79.9)
Pension and Postretirement Benefit Adjustments, Net of Tax
Schedule of accumulated other comprehensive loss
Balance at the beginning of the year	(25.5)
Current-year change	0.7
Balance at the end of the year	$ (24.8)