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
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net earnings	$ 1,219	$ 1,336
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	2	2
Net earnings available to common shareholders	$ 1,217	$ 1,334
Basic weighted average shares outstanding	659.6	705.7
Participating securities	1.0	1.1
Basic weighted average common shares outstanding	658.6	704.6
Basic weighted average shares outstanding	659.6	705.7
Dilutive potential common shares	6.2	8.5
Diluted weighted average shares outstanding	665.8	714.2
Participating securities	1.0	1.1
Diluted weighted average common shares outstanding	664.8	713.1
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.85	$ 1.89
Income (Loss) from Continuing Operations, Per Diluted Share	$ 1.83	$ 1.87