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								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net earnings	$ 3,424	$ 2,363	$ 2,196	$ 2,477	$ 3,320	$ 1,810	$ 1,749	$ 1,579	$ 10,460	$ 8,458	$ 5,034
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									7	6	3
Net earnings available to common shareholders									$ 10,453	$ 8,452	$ 5,031
Basic weighted average shares outstanding									579.9	603.2	636.5
Participating securities									0.7	0.7	1.0
Basic weighted average common shares outstanding									579.2	602.5	635.5
Basic weighted average shares outstanding									579.9	603.2	636.5
Dilutive potential common shares									6.3	7.5	7.3	[1]
Dilutive weighted average shares outstanding									586.2	610.7	643.8
Participating securities									0.7	0.7	1.0
Diluted weighted average common shares outstanding									585.5	610.0	642.8
Income (Loss) from Continuing Operations, Per Basic Share									$ 18.05	$ 14.03	$ 7.92
Income (Loss) from Continuing Operations, Per Diluted Share									$ 17.85	$ 13.85	$ 7.83

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