Income Taxes (Schedule Of Components Of Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal and state	$ 544	$ 352	$ 261
Foreign	352	314	324
Total current provision	896	666	585
Deferred:
Federal and state	(44)	(58)	(20)
Foreign	(47)	(68)	(80)
Total deferred benefit	(91)	(126)	(100)
Total provision for income taxes	$ 805	$ 540	$ 485