Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended											6 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Net earnings attributable to controlling interests	$ 374	$ 476	$ 223	$ 269	$ 510	$ 182	$ 284	$ 399	$ 80	$ 460		$ 692	$ 540	$ 1,342	$ 1,375	$ 1,223	$ 2,036
Average shares outstanding												660	669	661	660	665	642
Basic earnings per share (dollars per share)	$ 0.57	$ 0.72	$ 0.34	$ 0.41	$ 0.77	$ 0.28	$ 0.43	$ 0.60	$ 0.12	$ 0.68		$ 1.05	$ 0.81	$ 2.03	$ 2.08	$ 1.84	$ 3.17
Plus: After-tax interest on 4.7% debentures related to $1.75 billion Equity Units																	13
Adjusted net earnings attributable to controlling interests												692	540	1,342	1,375	1,223	2,049
Share-based compensation awards												1	1	2	2	1	1
Shares assumed issued related to $1.75 billion equity units											44						11
Adjusted average shares outstanding												661	670	663	662	666	654
Diluted earnings per share (dollars per share)	$ 0.56	$ 0.72	$ 0.34	$ 0.41	$ 0.77	$ 0.28	$ 0.43	$ 0.60	$ 0.12	$ 0.68		$ 1.05	$ 0.81	$ 2.02	$ 2.08	$ 1.84	$ 3.13
Interest rate stated percentage									4.70%				4.70%
Face amount of equity units									$ 1,750		$ 1,750		$ 1,750