Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Class A Common Stock Amount	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		50,349,546
Beginning Balance at Dec. 31, 2013	$ 959	$ 1	$ 143	$ (679)	$ 1,503	$ (9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards, shares		1,370,705
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards net of cancellations	28		(22)	50
Shares withheld related to net share settlement (in shares)		(65,914)
Treaury stock withheld related to net share settlement (in shares)	(5)			(5)
Additional tax benefit resulting from exercise of options	6		6
Share-based compensation	20		20
Net (loss) income	32				32
Unrealized loss on anticipated sales hedging transactions (net of income taxes)	7					7
Unrealized loss on forward interest rate swaps hedging transactions (net of income taxes)	(8)					(8)
Foreign currency translation adjustment	1					1
Ending Balance at Dec. 31, 2014	1,040	$ 1	147	(634)	1,535	(9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		51,654,337
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards, shares		646,395
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards net of cancellations	17		1	16
Shares withheld related to net share settlement (in shares)		(138,881)
Treaury stock withheld related to net share settlement (in shares)	(13)			(13)
Additional tax benefit resulting from exercise of options	11		11
Share-based compensation	31		31
Net (loss) income	(158)				(158)
Unrealized loss on anticipated sales hedging transactions (net of income taxes)	(6)					(6)
Unrealized loss on forward interest rate swaps hedging transactions (net of income taxes)	(7)					(7)
Foreign currency translation adjustment	(26)					(26)
Issuance of warrants exercisable for 250,000 shares, exercise price $89.34, expiration April 5, 2017	4		4
Ending Balance at Dec. 31, 2015	893	$ 1	194	(631)	1,377	(48)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		52,161,851
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards, shares		817,943
Issuance of treasury shares upon exercise of stock options, purchases under stock purchase plan and grants of restricted stock awards net of cancellations	11		(14)	25
Shares withheld related to net share settlement (in shares)		(95,206)
Treaury stock withheld related to net share settlement (in shares)	(8)			(8)
Additional tax benefit resulting from exercise of options	3		3
Share-based compensation	27		27
Net (loss) income	(137)
Unrealized loss on anticipated sales hedging transactions (net of income taxes)	7
Unrealized loss on forward interest rate swaps hedging transactions (net of income taxes)	0
Foreign currency translation adjustment	(4)
Ending Balance at Dec. 31, 2016	$ 792	$ 1	$ 210	$ (614)	$ 1,240	$ (45)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		52,884,588