CONSOLIDATED STATEMENT OF STOCKHOLDER'S DEFICIENCY - USD ($) $ in Millions		3 Months Ended						12 Months Ended
		Dec. 31, 2016	Mar. 31, 2016		Dec. 31, 2015		Mar. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ (491.6)	[1]			$ (557.0)	$ (491.6)	[1]	$ (557.0)		$ (516.5)
Stock-based compensation amortization								6.4		5.1		5.5
Excess tax benefits from stock-based compensation								0.5		0.3		0.1
Net (loss) income		$ (34.8)	13.0		$ 26.3		0.6	(15.7)		62.1	[2]	47.3	[2]
Other comprehensive loss, net	[3]							(6.4)		(2.1)		(93.4)
Ending balance		(506.8)			(491.6)	[1]		(506.8)		(491.6)	[1]	(557.0)
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			54.6				54.6	54.6		54.6		54.6
Ending balance		54.6			54.6			54.6		54.6		54.6
Additional Paid-In-Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			957.5				952.1	957.5		952.1		946.5
Stock-based compensation amortization								6.4		5.1		5.5
Excess tax benefits from stock-based compensation								0.5		0.3		0.1
Ending balance		964.4			957.5			964.4		957.5		952.1
Accumulated Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			(1,258.4)				(1,320.5)	(1,258.4)		(1,320.5)		(1,367.8)
Net (loss) income								(15.7)		62.1		47.3
Ending balance		(1,274.1)			(1,258.4)			(1,274.1)		(1,258.4)		(1,320.5)
Accumulated Other Comprehensive Loss [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ (245.3)				$ (243.2)	(245.3)		(243.2)		(149.8)
Other comprehensive loss, net	[3]							(6.4)		(2.1)		(93.4)
Ending balance		$ (251.7)			$ (245.3)			$ (251.7)		$ (245.3)		$ (243.2)

[1] Adjusted as a result of the adoption of certain accounting pronouncements beginning on January 1, 2016. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements," for details of these adjustments.

[2] Adjusted as a result of the adoption of certain accounting pronouncements beginning on January 1, 2016. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements," for details of these adjustments.

[3] See Note 17, “Accumulated Other Comprehensive Loss,” regarding the changes in the accumulated balances for each component of other comprehensive loss during 2016, 2015 and 2014.