Income Taxes (Net Provision For Income Taxes For Continuing Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
U.S. federal	$ 471	$ 587	$ 656
State	36	48	31
International	119	95	77
Total current	626	730	764
Deferred:
U.S. federal	49	(37)	215
State	1	8	7
International	42	26	60
Adjustment for enacted change in U.S. tax law	0	0	119
Total deferred	92	(3)	401
Provision for income taxes, net	718	727	1,165
Net income tax payments	$ 572	$ 532	$ 617