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		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net earnings/(loss)		$ 1,761	$ (234)	$ 3,212	$ 985
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic				2
Net earnings available to common shareholders		$ 1,761	$ (234)	$ 3,210	$ 985
Basic weighted average shares outstanding		602.5	636.3	608.4	648.5
Participating securities		0.7	1.0	0.8	1.0
Basic weighted average common shares outstanding		601.8	635.3	607.6	647.5
Basic weighted average shares outstanding		602.5	636.3	608.4	648.5
Dilutive potential common shares	[1]	7.1		6.9	6.4
Diluted weighted average shares outstanding		609.6	636.3	615.3	654.9
Participating securities		0.7	1.0	0.8	1.0
Diluted weighted average common shares outstanding		608.9	635.3	614.5	653.9
Income (Loss) from Continuing Operations, Per Basic Share		$ 2.93	$ (0.37)	$ 5.28	$ 1.52
Income (Loss) from Continuing Operations, Per Diluted Share		$ 2.89	$ (0.37)	$ 5.22	$ 1.51

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