Stockholder's Equity - Schedule of Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Unrealized foreign currency translation losses, net of income tax benefit of $0.4 and $0.0, respectively	$ (27.5)	$ (20.8)
Net loss from pension and other postretirement benefit liabilities (net of income tax benefits of $36.8 million and $33.8 million, respectively)	(64.5)	(57.5)
Accumulated other comprehensive loss	(92.0)	(78.3)
Foreign currency translation losses, tax benefit	0.4	0.0
Net loss from pension and other postretirement benefit liabilities, tax benefit	$ 36.8	$ 33.8