v3.25.4
Pension and Postretirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Benefits | United States      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 123 $ 116 $ 108
Interest cost 127 114 118
Expected return on plan assets (151) (153) (126)
Amortization of net actuarial loss (gain) 16 12 11
Settlement losses 9 7 17
Net periodic benefit cost 124 96 128
Pension Benefits | Int’l.      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 12 14 13
Interest cost 35 32 31
Expected return on plan assets (46) (45) (43)
Amortization of net actuarial loss (gain) (1) 0 (3)
Settlement losses 0 0 0
Net periodic benefit cost 0 1 (2)
Other Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 3 3 3
Interest cost 7 7 8
Expected return on plan assets 0 0 0
Amortization of net actuarial loss (gain) (5) (5) (6)
Settlement losses 0 0 0
Net periodic benefit cost $ 5 $ 5 $ 5