Organization and Basis of Presentation (Schedule of Net Income Attributable to Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Net Income Attributable to Noncontrolling Interest [Abstract]
Income From Continuing Operations	$ 717	$ 577
Income From Continuing Operations Attributable to Noncontrolling Interests	1	3
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	716	574
Income From Discontinued Operations, net of tax		122
Income From Discontinued Operations Attributable to Noncontrolling Interests, net of tax		2
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		120
Net Income	717	699
Net Income (Loss) Attributable to Noncontrolling Interests	1	5
Net Income Attributable to Parent	$ 716	$ 694