Income Taxes (Taxes on Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S., income before income taxes	$ 460	$ 819	$ 725
Other, income before income taxes	1,784	1,824	1,755
Total income before income taxes	2,244	2,643	2,480
U.S. Federal, current	82	313	208
Other national governments, current	449	388	366
U.S. state and local, current	82	36	43
Total current income taxes	613	737	617
U.S. Federal, deferred	(30)	286	26
Other national governments, deferred	(1)	72	32
U.S. state and local, deferred	(8)	38	10
Total deferred income taxes	(39)	396	68
Total income taxes	$ 574	$ 1,133	$ 685