Earnings Per Share (Schedule Of Weighted-Average Number Of Shares Outstanding Used To Compute Earnings Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Earnings Per Share [Abstract]
Net earnings	$ 978	$ 1,032	$ 967	$ 923	$ 1,393	$ 1,098	$ 941	$ 586	$ 3,900		$ 4,018		$ 3,307
Undistributed Earnings Allocated to Participating Securities									8		9		9
Net earnings available to common shareholders									$ 3,892		$ 4,009		$ 3,298
Weighted Average Number of Shares Outstanding, Basic and Diluted									758.0		746.6		738.1
Weighted Average Number of Shares, Contingently Issuable									2.3		2.5		3.1
Basic weighted average common shares outstanding									755.7		744.1		735.0
Dilutive potential common shares									5.8	[1]	6.5	[1]	6.2	[1]
Dilutive weighted average shares outstanding									763.8		753.1		744.3
Diluted weighted average common shares outstanding									761.5		750.6		741.2
Net earnings per share, Basic	$ 1.29	$ 1.36	$ 1.28	$ 1.23	$ 1.86	$ 1.47	$ 1.27	$ 0.79	$ 5.15		$ 5.39		$ 4.49
Net earnings per share, Diluted	$ 1.28	$ 1.35	$ 1.27	$ 1.22	$ 1.84	$ 1.46	$ 1.25	$ 0.78	$ 5.11		$ 5.34		$ 4.45

[1] Diluted EPS includes any dilutive impact of stock options, restricted stock units and Performance Awards.