Pension, Savings and Other Postretirement Benefit Plans - Defined Benefit Pension Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Type [Extensible Enumeration]	Pension Plan	Pension Plan	Pension Plan	Pension Plan
Service cost	$ 1	$ 2	$ 4	$ 6
Interest cost	40	44	121	131
Expected return on plan assets	(50)	(52)	(151)	(156)
Amortization of net losses	24	24	71	72
Net periodic pension cost	15	18	45	53
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net curtailments/settlements/termination benefits	68	0	76	(5)
Total defined benefit pension cost	$ 83	$ 18	$ 121	$ 48
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Type [Extensible Enumeration]	Pension Plan	Pension Plan	Pension Plan	Pension Plan
Service cost	$ 4	$ 5	$ 12	$ 14
Interest cost	26	26	76	79
Expected return on plan assets	(24)	(23)	(70)	(68)
Amortization of prior service cost	0	0	1	1
Amortization of net losses	6	5	16	15
Net periodic pension cost	12	13	35	41
Non-U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net curtailments/settlements/termination benefits	0	0	1	0
Total defined benefit pension cost	$ 12	$ 13	$ 36	$ 41