Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of year	$ 1,175	$ 1,181	$ 986
Additions based on tax positions related to the current year	47	47	71
Additions for tax positions of prior years	166	24	197
Reductions for tax positions of prior years	(100)	(20)	(16)
Acquisitions, divestitures and other	53	(30)	7
Lapse of statute of limitations	(219)	(13)	(51)
Settlements	(4)	(38)	(12)
Effect of foreign currency translation	(23)	24	(1)
Unrecognized tax benefits, end of year	$ 1,095	$ 1,175	$ 1,181