UNAUDITED CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIENCY - USD ($) $ in Millions		3 Months Ended	9 Months Ended
		Sep. 30, 2017	Sep. 30, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ (506.8)
Stock-based compensation amortization			5.9
Net (loss) income		$ (30.8)	(101.6)
Other comprehensive loss, net		1.4	15.8	[1]
Ending balance		(586.7)	(586.7)
Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			54.6
Ending balance		54.6	54.6
Additional Paid-In-Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			964.4
Stock-based compensation amortization			5.9
Ending balance		970.3	970.3
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(1,274.1)
Net (loss) income			(101.6)
Ending balance		(1,375.7)	(1,375.7)
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(251.7)
Other comprehensive loss, net	[1]		15.8
Ending balance		$ (235.9)	$ (235.9)

[1] See Note 13, “Accumulated Other Comprehensive Loss,” regarding the changes in the accumulated balances for each component of other comprehensive loss during the nine months ended September 30, 2017.