Postretirement Benefit Plans - Benefit Obligations and Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in plan assets
Funded status at end of year	$ 53	$ 61
U.S. | Defined Benefit
Change in plan benefit obligation
Benefit obligation at beginning of year:	521	895
Service cost	8	15	$ 21
Interest cost	28	29	30
Participant contributions	0	0
Benefits paid	(13)	(12)
Settlements	(40)	(309)
Curtailments	0	0
Actuarial loss (gain)	1	(97)
Effects of exchange rate changes	0	0
Benefit obligation at end of year	505	521	895
Change in plan assets
Fair value of plan assets at beginning of year:	421	934
Actual return on plan assets	47	(205)
Participant contributions	0	0
Benefits paid	(13)	(12)
Settlements	(40)	(309)
Effects of exchange rate changes	0	0
Other	0	0
Fair value of plan assets at end of year	418	421	934
Funded status at end of year	(87)	(100)
U.S. | Defined Benefit | Qualified Plan
Change in plan assets
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0
U.S. | Defined Benefit | Nonqualified Plan
Change in plan assets
Defined Benefit Plan, Plan Assets, Contributions by Employer	3	13
U.S. | Retiree Health Care
Change in plan benefit obligation
Benefit obligation at beginning of year:	274	360
Service cost	2	3	3
Interest cost	15	11	10
Participant contributions	14	15
Benefits paid	(41)	(41)
Settlements	0	0
Curtailments	0	0
Actuarial loss (gain)	(6)	(74)
Effects of exchange rate changes	0	0
Benefit obligation at end of year	258	274	360
Change in plan assets
Fair value of plan assets at beginning of year:	280	385
Actual return on plan assets	29	(80)
Participant contributions	14	15
Benefits paid	(41)	(41)
Settlements	0	0
Effects of exchange rate changes	0	0
Other	(19)	0
Fair value of plan assets at end of year	264	280	385
Funded status at end of year	6	6
U.S. | Retiree Health Care | Qualified Plan
Change in plan assets
Defined Benefit Plan, Plan Assets, Contributions by Employer	1	1
U.S. | Retiree Health Care | Nonqualified Plan
Change in plan assets
Defined Benefit Plan, Plan Assets, Contributions by Employer	0	0
Non-U.S. | Defined Benefit
Change in plan benefit obligation
Benefit obligation at beginning of year:	1,667	2,574
Service cost	16	25	36
Interest cost	57	33	37
Participant contributions	1	5
Benefits paid	(77)	(86)
Settlements	(6)	(91)
Curtailments	0	(4)
Actuarial loss (gain)	80	(547)
Effects of exchange rate changes	(6)	(242)
Benefit obligation at end of year	1,732	1,667	2,574
Change in plan assets
Fair value of plan assets at beginning of year:	1,822	2,813
Actual return on plan assets	137	(557)
Participant contributions	1	5
Benefits paid	(77)	(86)
Settlements	(6)	(91)
Effects of exchange rate changes	(13)	(271)
Other	0	0
Fair value of plan assets at end of year	1,866	1,822	$ 2,813
Funded status at end of year	134	155
Non-U.S. | Defined Benefit | Qualified Plan
Change in plan assets
Defined Benefit Plan, Plan Assets, Contributions by Employer	2	9
Non-U.S. | Defined Benefit | Nonqualified Plan
Change in plan assets
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0