Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning of year	$ 1,139	$ 1,095	$ 1,175
Additions based on tax positions related to the current year	72	44	47
Additions for tax positions of prior years	41	49	166
Reductions for tax positions of prior years	(15)	(10)	(100)
Acquisitions, divestitures and other	(14)	6	53
Lapse of statute of limitations	(11)	(16)	(219)
Settlements	(8)	(7)	(4)
Effect of foreign currency translation	10	(22)	(23)
Unrecognized tax benefits, end of year	$ 1,214	$ 1,139	$ 1,095