Condensed Consolidated Statements of Stockholders' Deficit Statement - USD ($) $ in Millions	Total	Common Stock Including Additional Paid in Capital [Member]	Accumulated Deficit [Member]	AOCI Attributable to Parent [Member]
Stockholders' Deficit	$ (1,562.2)	$ 12,644.5	$ (14,204.0)	$ (2.7)
Stock Repurchased During Period, Value		(230.5)
Stock-based compensation expense		14.1
Stock Issued During Period, Value, Employee Stock Purchase Plan		8.0
Excise tax on repurchase of common stock	(1.9)
Net Income	178.7		178.7
Other Comprehensive Income (Loss), Net of Tax	0.0			0.0
Stockholders' Deficit	(1,593.8)	12,434.2	(14,025.3)	(2.7)
Stockholders' Deficit	(1,581.0)	11,808.0	(13,386.4)	(2.6)
Stock Repurchased During Period, Value		(269.9)
Stock-based compensation expense		15.3
Stock Issued During Period, Value, Employee Stock Purchase Plan		8.3
Excise tax on repurchase of common stock	(2.3)
Net Income	194.1		194.1
Other Comprehensive Income (Loss), Net of Tax	(0.2)			(0.2)
Stockholders' Deficit	$ (1,635.7)	$ 11,559.4	$ (13,192.3)	$ (2.8)