Organization and Basis of Presentation (Schedule of Net Income Attributable to Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of Net Income Attributable to Noncontrolling Interest [Abstract]
Income From Continuing Operations	$ 957	$ 1,001	$ 2,365	$ 2,202
Income From Continuing Operations Attributable to Noncontrolling Interests	1	2	5	5
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	956	999	2,360	2,197
(Loss) Income From Discontinued Operations, net of tax	(2)	180	(4)	190
Income From Discontinued Operations Attributable to Noncontrolling Interests, net of tax		3		8
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		177		182
Net Income	955	1,181	2,361	2,392
Net Income (Loss) Attributable to Noncontrolling Interests	1	5	5	13
Net Income (Loss) Attributable to Parent	$ 954	$ 1,176	$ 2,356	$ 2,379