Pension, Savings and Other Postretirement Benefit Plans - Changes in Benefit Obligation and Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Change in benefit obligation:
Curtailments/settlements/ termination benefits	$ 201	$ (3)	$ 40
Pension Plans
Change in benefit obligation:
Service cost — benefits earned	(27)
Actuarial (loss) gain	1	1
Pension Plans | U.S.
Change in benefit obligation:
Beginning balance	(3,380)	(3,659)
Service cost — benefits earned	(6)	(7)	(8)
Interest cost	(158)	(174)	(195)
Plan amendments	0	3
Actuarial (loss) gain	(96)	107
Participant contributions	0	0
Curtailments/settlements/ termination benefits	369	13
Divestitures	0	0
Foreign currency translation	0	0
Benefit payments	307	337
Ending balance	(2,964)	(3,380)	(3,659)
Change in plan assets:
Beginning balance	3,447	3,724
Actual return on plan assets	240	61
Company contributions to plan assets	0	(5)
Cash funding of direct participant payments	37	17
Participant contributions	0	0
Settlements	(376)	(13)
Divestitures	0	0
Foreign currency translation	0	0
Benefit payments	(307)	(337)
Ending balance	3,041	3,447	3,724
Funded status at end of year	77	67
Pension Plans | Non-U.S.
Change in benefit obligation:
Beginning balance	(2,111)	(2,392)
Service cost — benefits earned	(15)	(19)	(18)
Interest cost	(103)	(105)	(108)
Plan amendments	0	0
Actuarial (loss) gain	48	131
Participant contributions	(2)	(3)
Curtailments/settlements/ termination benefits	4	12
Divestitures	9	0
Foreign currency translation	(166)	105
Benefit payments	157	160
Ending balance	(2,179)	(2,111)	(2,392)
Change in plan assets:
Beginning balance	1,906	2,146
Actual return on plan assets	52	(49)
Company contributions to plan assets	24	31
Cash funding of direct participant payments	22	26
Participant contributions	2	3
Settlements	(5)	(12)
Divestitures	(14)	0
Foreign currency translation	134	(79)
Benefit payments	(157)	(160)
Ending balance	1,964	1,906	2,146
Funded status at end of year	(215)	(205)
Other Postretirement Benefits
Change in benefit obligation:
Beginning balance	(232)	(287)
Service cost — benefits earned	(1)	(2)	(2)
Interest cost	(13)	(15)	(16)
Plan amendments	0	28
Actuarial (loss) gain	(4)	11
Participant contributions	(6)	(6)
Curtailments/settlements/ termination benefits	1	0
Divestitures	0	0
Foreign currency translation	(6)	8
Benefit payments	30	31
Ending balance	(231)	(232)	(287)
Change in plan assets:
Beginning balance	0	0
Actual return on plan assets	0	0
Company contributions to plan assets	0	0
Cash funding of direct participant payments	24	25
Participant contributions	6	6
Settlements	0	0
Divestitures	0	0
Foreign currency translation	0	0
Benefit payments	(30)	(31)
Ending balance	0	0	$ 0
Funded status at end of year	(231)	(232)
Other Postretirement Benefits | U.S.
Change in plan assets:
Funded status at end of year	148	153
Other Postretirement Benefits | Non-U.S.
Change in plan assets:
Funded status at end of year	$ 83	$ 79