Consolidated Statement Of Shareholders' Equity (USD $) In Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income
Balances at Dec. 31, 2012	$ 8,597	$ 38	$ 1,098	$ 7,332	$ 129
Net earnings	620			620
Other comprehensive income	17				17
Issuance of shares of common stock under stock option and benefit plans, including excess income tax benefit	(2)		(2)
Repurchase and retirement of common stock	(252)		(11)	(241)
Share-based compensation	57		57
Cash dividends declared of common stock	(300)			(300)
Balances at Sep. 30, 2013	$ 8,737	$ 38	$ 1,142	$ 7,411	$ 146