CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $)	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2011	$ 10,492,000,000	$ 0	$ 0	$ 9,616,000,000	$ 948,000,000	$ (72,000,000)
Balance (in shares) at Dec. 31, 2011		1,133,000,000	0
Components of comprehensive income (loss):
Net income	1,149,000,000				1,149,000,000
Other comprehensive income (loss)	46,000,000					46,000,000
Issuance of common stock pursuant to employee stock options	33,000,000			33,000,000
Issuance of common stock pursuant to employee stock options (in shares)		5,000,000
Issuance of common stock pursuant to restricted stock rights (in shares)		4,000,000
Restricted stock surrendered for employees' tax liability	(16,000,000)			(16,000,000)
Restricted stock surrendered for employees' tax liability (in shares)		(1,000,000)
Forfeiture of restricted stock rights (in shares)		(3,000,000)
Stock-based compensation expense related to employee stock options and restricted stock rights	132,000,000			132,000,000
Dividends ($0.20, $0.19, and $0.18 per common share at December 31, 2014, 2013, and 2012, respectively)	(204,000,000)				(204,000,000)
Shares repurchased (see Note 19)	(315,000,000)		(315,000,000)
Shares repurchased (in shares)			(26,000,000)
Retirement of treasury shares	0		315,000,000	(315,000,000)
Retirement of treasury shares (shares)		(26,000,000)	(26,000,000)
Balance at Dec. 31, 2012	11,317,000,000	0	0	9,450,000,000	1,893,000,000	(26,000,000)
Balance (in shares) at Dec. 31, 2012		1,112,000,000	0
Components of comprehensive income (loss):
Net income	1,010,000,000				1,010,000,000
Other comprehensive income (loss)	94,000,000					94,000,000
Issuance of common stock pursuant to employee stock options	158,000,000			158,000,000
Issuance of common stock pursuant to employee stock options (in shares)		16,000,000
Issuance of common stock pursuant to restricted stock rights (in shares)		8,000,000
Restricted stock surrendered for employees' tax liability	(49,000,000)			(49,000,000)
Restricted stock surrendered for employees' tax liability (in shares)		(4,000,000)
Tax benefit associated with employee stock awards	11,000,000			11,000,000
Stock-based compensation expense related to employee stock options and restricted stock rights	112,000,000			112,000,000
Dividends ($0.20, $0.19, and $0.18 per common share at December 31, 2014, 2013, and 2012, respectively)	(217,000,000)				(217,000,000)
Shares repurchased (see Note 19)	(5,830,000,000)		(5,830,000,000)
Shares repurchased (in shares)			(429,000,000)
Indemnity on tax attributes assumed in connection with the Purchase Transaction (see Note 17)	16,000,000		16,000,000
Balance at Dec. 31, 2013	6,622,000,000	0	(5,814,000,000)	9,682,000,000	2,686,000,000	68,000,000
Balance (in shares) at Dec. 31, 2013		1,132,000,000	429,000,000
Components of comprehensive income (loss):
Net income	835,000,000				835,000,000
Other comprehensive income (loss)	(371,000,000)					(371,000,000)
Issuance of common stock pursuant to employee stock options	172,000,000			172,000,000
Issuance of common stock pursuant to employee stock options (in shares)		14,000,000
Issuance of common stock pursuant to restricted stock rights (in shares)		7,000,000
Restricted stock surrendered for employees' tax liability	(66,000,000)			(66,000,000)
Restricted stock surrendered for employees' tax liability (in shares)		(2,000,000)
Tax benefit associated with employee stock awards	30,000,000			30,000,000
Stock-based compensation expense related to employee stock options and restricted stock rights	106,000,000			106,000,000
Dividends ($0.20, $0.19, and $0.18 per common share at December 31, 2014, 2013, and 2012, respectively)	(147,000,000)				(147,000,000)
Indemnity on tax attributes assumed in connection with the Purchase Transaction (see Note 17)	52,000,000		52,000,000
Balance at Dec. 31, 2014	$ 7,233,000,000	$ 0	$ (5,762,000,000)	$ 9,924,000,000	$ 3,374,000,000	$ (303,000,000)
Balance (in shares) at Dec. 31, 2014	722,000,000	1,151,000,000	429,000,000