CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (UNAUDITED) (USD $) In Millions, unless otherwise specified		Total	Common Stock		Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2014		$ 1,796	$ 1		$ 2,168	$ 503	$ (802)	$ (74)	[1]
Balance (in shares) at Dec. 31, 2014			98	[2]			10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		115				115
Foreign currency translation adjustments		(89)						(89)	[1]
Stock compensation expense, net					14
4 percent Convertible Senior Notes (in shares)	[2],[3]		3
4 percent Convertible Senior Notes	[3]				1
Shares repurchased and retired					(27)
Repurchase of common stock (in shares)			(4)	[2]			4
Repurchase of common stock							(316)
Balance at Mar. 31, 2015		$ 1,494	$ 1		$ 2,156	$ 618	$ (1,118)	$ (163)	[1]
Balance (in shares) at Mar. 31, 2015			97	[2]			14

[1] The Accumulated Other Comprehensive Loss balance primarily reflects foreign currency translation adjustments.

[2] An aggregate of less than 5 million net shares were issued during the year ended December 31, 2014.

[3] Reflects amortization of the original issue discount on the 4 percent Convertible Senior Notes (an amount equal to the unamortized portion of the original issue discount is reflected as “temporary equity” in our consolidated balance sheet) and the conversion of a portion of the 4 percent Convertible Senior Notes during the three months ended March 31, 2015. See note 7 to our condensed consolidated financial statements for additional detail.