Consolidated Statement Of Shareholders' Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2013
Issuance of common stock under stock option and benefit plans, shares				5.9
Issuance of common stock under stock option and benefit plans, excess income tax benefit				$ 5
Repurchase and retirement of common stock, shares				3.9
Cash dividends declared, per share of common stock	$ 0.2650	$ 0.2650	$ 0.2650	$ 0.7950
Dividend payable date	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Oct. 31, 2013
Dividend record date	Sep. 30, 2013	Jun. 28, 2013	Mar. 28, 2013	Sep. 30, 2013