Earnings Per Share (Schedule Of Weighted-Average Number Of Shares Outstanding Used To Compute Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net earnings		$ 1,853	$ 2,279	$ 5,065	$ 3,264
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		2	3	4	3
Net earnings available to common shareholders		$ 1,851	$ 2,276	$ 5,061	$ 3,261
Basic weighted average shares outstanding		598.3	625.5	605.6	641.2
Participating securities		0.7	0.9	0.8	1.0
Basic weighted average common shares outstanding		597.6	624.6	604.8	640.2
Basic weighted average shares outstanding		598.3	625.5	605.6	641.2
Dilutive potential common shares	[1]	8.0	7.2	7.2	6.7
Diluted weighted average shares outstanding		606.3	632.7	612.8	647.9
Participating securities		0.7	0.9	0.8	1.0
Diluted weighted average common shares outstanding		605.6	631.8	612.0	646.9
Income (Loss) from Continuing Operations, Per Basic Share		$ 3.10	$ 3.64	$ 8.37	$ 5.09
Income (Loss) from Continuing Operations, Per Diluted Share		$ 3.06	$ 3.60	$ 8.27	$ 5.04

[1] Diluted earnings per share includes any dilutive impact of stock options, restricted stock units, performance-based restricted stock units and performance awards.