Benefit Plans (Net Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
UNITED STATES
Change in projected benefit obligation:
Benefit obligation, beginning period	$ 914	$ 1,225
Service cost	8	14	$ 14
Interest cost	47	28	24
Plan amendments	2	0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	0	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(115)	(65)
Defined Benefit Plan, Plan Assets, Divestiture	0	0
Actuarial loss (gain)	19	(288)
Effect of foreign currency exchange rate changes	0	0
Benefit obligation, ending period	875	914	1,225
Change in plan assets:
Fair value of plan assets, beginning period	911	1,218
Actual return on plan assets	80	(250)
Employer contributions	8	8
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	(116)	(65)
Effect of foreign currency exchange rate changes	0	0
Fair value of plan assets, ending period	883	911	1,218
Funded status as of December 31	8	(3)
Foreign Plan [Member]
Change in projected benefit obligation:
Benefit obligation, beginning period	177	173
Service cost	4	4	6
Interest cost	21	17	15
Defined Benefit Plan, Benefit Obligation, Interest cost	21	17
Plan amendments	0	0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	(1)	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(15)	(13)
Defined Benefit Plan, Plan Assets, Divestiture	0	(1)
Actuarial loss (gain)	(2)	(11)
Effect of foreign currency exchange rate changes	6	8
Benefit obligation, ending period	190	177	173
Change in plan assets:
Fair value of plan assets, beginning period	114	106
Actual return on plan assets	10	7
Employer contributions	9	5
Defined Benefit Plan, Plan Assets, Payment for Settlement	(1)	0
Defined Benefit Plan, Plan Assets, Benefits Paid	(15)	(13)
Effect of foreign currency exchange rate changes	10	9
Fair value of plan assets, ending period	127	114	$ 106
Funded status as of December 31	$ (63)	$ (63)