Goodwill And Other Intangibles (Changes In The Carrying Amount Of Goodwill) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Balance as of January 1, as reported		$ 7,889	$ 7,241
Goodwill acquired		556	783
Other adjustments	[1]	(76)	(135)
Balance at December 31,		$ 8,369	$ 7,889

[1] Primarily due to the impact of foreign exchange in both years.