Pension, Savings and Other Postretirement Benefit Plans - Benefit Costs and Amounts Recognized in Other Comprehensive (Income) Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Plans
Benefits cost (credit):
Service cost	$ 27
Other Postretirement Benefits
Benefits cost (credit):
Service cost	1	$ 2	$ 2
Interest cost	13	15	16
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	(7)	(2)	(1)
Amortization of net losses (gains)	(8)	(9)	(9)
Net periodic cost (credit)	(1)	6	8
Net curtailments/settlements/termination benefits	(1)	0	0
Total benefits cost (credit)	(2)	6	8
Recognized in other comprehensive (income) loss before tax and minority:
Prior service cost (credit) from plan amendments	0	(28)	0
Increase (decrease) in net actuarial losses	2	(9)	1
Amortization of prior service credit (cost) in net periodic cost	7	3	1
Amortization of net (losses) gains in net periodic cost	8	8	9
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures	0	0	0
Total recognized in other comprehensive (income) loss before tax and minority	17	(26)	11
Total recognized in total benefits cost (credit) and other comprehensive loss (income) before tax and minority	15	(20)	19
Total plan assets, fair value	0	0	0
U.S. | Pension Plans
Benefits cost (credit):
Service cost	6	7	8
Interest cost	158	174	195
Expected return on plan assets	(198)	(208)	(231)
Amortization of prior service cost (credit)	0	0	0
Amortization of net losses (gains)	94	97	98
Net periodic cost (credit)	60	70	70
Net curtailments/settlements/termination benefits	208	(3)	34
Total benefits cost (credit)	268	67	104
Recognized in other comprehensive (income) loss before tax and minority:
Prior service cost (credit) from plan amendments	0	(3)	0
Increase (decrease) in net actuarial losses	54	40	40
Amortization of prior service credit (cost) in net periodic cost	0	0	0
Amortization of net (losses) gains in net periodic cost	(94)	(97)	(98)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures	(201)	3	(34)
Total recognized in other comprehensive (income) loss before tax and minority	(241)	(57)	(92)
Total recognized in total benefits cost (credit) and other comprehensive loss (income) before tax and minority	27	10	12
Total plan assets, fair value	3,041	3,447	3,724
U.S. | Other Postretirement Benefits
Benefits cost (credit):
Total benefits cost (credit)	(3)	3	5
U.S. | Retirement Plan | Total
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	2,710	2,861
U.S. | Retirement Plan | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	0	0
U.S. | Retirement Plan | Significant Other Observable Inputs (Level 2)
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	2,709	2,860
U.S. | Retirement Plan | Significant Unobservable Inputs (Level 3)
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	1	1
Non-U.S. | Pension Plans
Benefits cost (credit):
Service cost	15	19	18
Interest cost	103	105	108
Expected return on plan assets	(93)	(91)	(92)
Amortization of prior service cost (credit)	2	2	2
Amortization of net losses (gains)	21	20	16
Net periodic cost (credit)	48	55	52
Net curtailments/settlements/termination benefits	(1)	0	7
Total benefits cost (credit)	47	55	59
Recognized in other comprehensive (income) loss before tax and minority:
Prior service cost (credit) from plan amendments	0	0	0
Increase (decrease) in net actuarial losses	30	(15)	120
Amortization of prior service credit (cost) in net periodic cost	(2)	(2)	(2)
Amortization of net (losses) gains in net periodic cost	(20)	(20)	(16)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements, and divestitures	2	0	(13)
Total recognized in other comprehensive (income) loss before tax and minority	10	(37)	89
Total recognized in total benefits cost (credit) and other comprehensive loss (income) before tax and minority	57	18	148
Total plan assets, fair value	1,964	1,906	2,146
Non-U.S. | Other Postretirement Benefits
Benefits cost (credit):
Total benefits cost (credit)	1	3	$ 3
Non-U.S. | Retirement Plan | Total
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	1,530	1,431
Non-U.S. | Retirement Plan | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	202	177
Non-U.S. | Retirement Plan | Significant Other Observable Inputs (Level 2)
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	1,304	1,231
Non-U.S. | Retirement Plan | Significant Unobservable Inputs (Level 3)
Recognized in other comprehensive (income) loss before tax and minority:
Total plan assets, fair value	$ 24	$ 23