Postretirement Benefit Plans (Summary of Amounts Recognized in Financial Statements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in benefit obligation:
Benefit obligation at beginning of year	$ 513
Benefit obligation at end of year	613	$ 513
Change in plan assets:
Beginning Balance	246
Ending Balance	296	246
Unfunded status of the plans	(317)	(267)
United States
Change in benefit obligation:
Benefit obligation at beginning of year	92	117
Service cost	2	3	$ 3
Interest cost	5	3	3
Benefits paid	(8)	(7)
Actuarial loss (gain) (a)	6	(24)
Plan amendments, settlements and curtailments (b)	2	0
Acquisitions	0	0
Foreign currency translation and other	0	0
Benefit obligation at end of year	99	92	117
Change in plan assets:
Beginning Balance	80	108
Employer contributions	5	0
Actual return on plan assets	9	(21)
Benefits paid	(8)	(7)
Plan amendments, settlements and curtailments	0	0
Acquisitions	0	0
Foreign currency translation and other	0	0
Ending Balance	86	80	108
Unfunded status of the plans	(13)	(12)
International defined benefit pension plans
Change in benefit obligation:
Benefit obligation at beginning of year	390	926
Service cost	7	12	14
Interest cost	16	13	11
Benefits paid	(18)	(29)
Actuarial loss (gain) (a)	36	(241)
Plan amendments, settlements and curtailments (b)	(2)	(202)
Acquisitions	31	0
Foreign currency translation and other	23	(89)
Benefit obligation at end of year	483	390	926
Change in plan assets:
Beginning Balance	166	571
Employer contributions	17	16
Actual return on plan assets	16	(133)
Benefits paid	(18)	(29)
Plan amendments, settlements and curtailments	(1)	(202)
Acquisitions	22	0
Foreign currency translation and other	8	(57)
Ending Balance	210	166	$ 571
Unfunded status of the plans	$ (273)	$ (224)