Postretirement Benefit Plans - Expense Related to Defined Benefit and Retiree Health Care Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 7	$ 8
Interest cost	25	25	28
Expected return on plan assets	(18)	(23)	(23)
Amortization of prior service cost (credit)	0	0	0
Recognized net actuarial losses (gains)	8	4	6
Net periodic benefit costs (credits)	22	13	19
Settlement losses (gains)	8	1	7
Total, including other postretirement losses (gains)	30	14	26
U.S. | Retiree Health Care
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2
Interest cost	13	13	15
Expected return on plan assets	(12)	(16)	(19)
Amortization of prior service cost (credit)	0	0	0
Recognized net actuarial losses (gains)	(1)	(3)	(5)
Net periodic benefit costs (credits)	1	(5)	(7)
Settlement losses (gains)	0	0	0
Total, including other postretirement losses (gains)	1	(5)	(7)
Non-U.S. | Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	15	16	16
Interest cost	60	55	57
Expected return on plan assets	(73)	(77)	(63)
Amortization of prior service cost (credit)	1	1	1
Recognized net actuarial losses (gains)	4	11	12
Net periodic benefit costs (credits)	7	6	23
Settlement losses (gains)	(1)	0	0
Total, including other postretirement losses (gains)	$ 6	$ 6	$ 23