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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net earnings		$ 1,167	$ 2,363	$ 374	$ 7,036
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		1	2		5
Net earnings available to common shareholders		$ 1,166	$ 2,361	$ 374	$ 7,031
Basic weighted average shares outstanding		565.2	574.8	566.2	582.7
Participating securities		0.6	0.6	0.6	0.7
Basic weighted average common shares outstanding		564.6	574.2	565.6	582.0
Basic weighted average shares outstanding		565.2	574.8	566.2	582.7
Dilutive potential common shares	[1]	4.0	6.0	4.2	6.2
Diluted weighted average shares outstanding		569.2	580.8	570.4	588.9
Participating securities		0.6	0.6	0.6	0.7
Diluted weighted average common shares outstanding		568.6	580.2	569.8	588.2
Earnings Per Share, Basic		$ 2.07	$ 4.11	$ 0.66	$ 12.08
Earnings Per Share, Diluted		$ 2.05	$ 4.07	$ 0.66	$ 11.95

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