Organization and Basis of Presentation (Schedule of Net Income Attributable to Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Net Income Attributable to Noncontrolling Interest [Abstract]
Income From Continuing Operations	$ 691	$ 624	$ 1,408	$ 1,201
Income From Continuing Operations Attributable to Noncontrolling Interests	3		4	3
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	688	624	1,404	1,198
(Loss) Income From Discontinued Operations, net of tax	(2)	(112)	(2)	10
Income From Discontinued Operations Attributable to Noncontrolling Interests, net of tax		3		5
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		(115)		5
Net Income	689	512	1,406	1,211
Net Income (Loss) Attributable to Noncontrolling Interests	3	3	4	8
Net Income Attributable to Parent	$ 686	$ 509	$ 1,402	$ 1,203