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, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net earnings	$ 1,466	$ 1,362	$ 1,653	$ 965	$ 1,233	$ 1,158	$ 1,088	$ 1,106	$ 5,446	$ 4,585	$ 3,900
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									6	7	8
Net earnings available to common shareholders									$ 5,440	$ 4,578	$ 3,892
Basic weighted average shares outstanding									728.9	760.8	758.0
Participating securities									1.3	1.9	2.3
Basic weighted average common shares outstanding									727.6	758.9	755.7
Basic weighted average shares outstanding									728.9	760.8	758.0
Dilutive potential common shares									9.1	8.7	5.8
Dilutive weighted average shares outstanding									738.0	769.5	763.8
Participating securities									1.3	1.9	2.3
Diluted weighted average common shares outstanding									736.7	767.6	761.5
Net earnings per share, Basic	$ 2.05	$ 1.88	$ 2.26	$ 1.30	$ 1.63	$ 1.53	$ 1.43	$ 1.45	$ 7.47	$ 6.03	$ 5.15
Net earnings per share, Diluted	$ 2.02	$ 1.86	$ 2.24	$ 1.28	$ 1.61	$ 1.51	$ 1.41	$ 1.44	$ 7.38	$ 5.96	$ 5.11