Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Millions	Total	Common Stock	Capital Surplus	Accumulated Other Comprehensive Loss	Retained Earnings	Treasury Stock
BALANCE at Dec. 31, 2012	$ 6,939	$ 1,141	$ 2,162	$ (413)	$ 5,928	$ (1,879)
BALANCE (in shares) at Dec. 31, 2012		188.3
Net income	277				277
Other comprehensive income (loss), net of tax	(125)			(125)
Cash dividends declared on common stock	(64)				(64)
Purchase of common stock	(146)					(146)
Purchase of common stock (in shares)		(4.1)
Net issuance of common stock under employee stock plans	9		(19)		(17)	45
Net issuance of common stock under employee stock plans (in shares)		1.0
Share-based compensation	18		18
Other	0		(1)			1
Other (in shares)		0
BALANCE at Jun. 30, 2013	6,908	1,141	2,160	(538)	6,124	(1,979)
BALANCE (in shares) at Jun. 30, 2013		185.2
BALANCE at Dec. 31, 2013	7,150	1,141	2,179	(391)	6,318	(2,097)
BALANCE (in shares) at Dec. 31, 2013		182.3
Net income	290				290
Other comprehensive income (loss), net of tax	87			87
Cash dividends declared on common stock	(71)				(71)
Purchase of common stock	(141)					(141)
Purchase of common stock (in shares)		(3.0)
Net issuance of common stock under employee stock plans	32		(25)		(17)	74
Net issuance of common stock under employee stock plans (in shares)		1.6
Share-based compensation	22		22
Other	0		(1)			1
Other (in shares)		0
BALANCE at Jun. 30, 2014	$ 7,369	$ 1,141	$ 2,175	$ (304)	$ 6,520	$ (2,163)
BALANCE (in shares) at Jun. 30, 2014		180.9