Goodwill And Other Intangibles (Changes In The Carrying Amount Of Goodwill) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Balance as of January 1, as reported		$ 9,089	$ 8,369
Goodwill acquired		626	551
Other adjustments	[1]	(116)	169
Balance at December 31,		$ 9,599	$ 9,089

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