Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	$ (102.7)
Current-period change	8.0
Balance at the end of the period	(94.7)
Deferred tax assets in accumulated other comprehensive loss, pension liabilities	6.5	$ 6.5
Foreign Currency Translation Loss
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	(76.8)
Current-period change	8.0
Balance at the end of the period	(68.8)
Pension and Postretirement Benefit Adjustments, Net of Tax
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	(25.9)
Balance at the end of the period	$ (25.9)