Income Taxes (Provision For Income Taxes From Continuing Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Federal U.S., current	$ (321)	$ 453	$ 283
Non-U.S., current	580	800	461
State and local, current	72	35	64
Federal U.S., deferred	530	(297)	(201)
Non-U.S., deferred	(16)	(128)	(12)
State and local, deferred	4	10	(39)
Income tax provision	$ 849	$ 873	$ 556