Income Taxes (Taxes on Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income before income taxes:
U.S.	$ 1,075	$ 657	$ 460
Other	1,718	1,782	1,784
Income before income taxes	2,793	2,439	2,244
Current –
U.S. Federal	172	70	82
Other national governments	456	455	449
U.S. state and local	79	57	82
Current income taxes	707	582	613
Deferred –
U.S. Federal	40	69	(30)
Other national governments	(14)	(16)	(1)
U.S. state and local	14	31	(8)
Deferred income taxes	40	84	(39)
Total income taxes	$ 747	$ 666	$ 574