v3.26.1
Pension and Postretirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension Benefits | U.S.    
Components of Net Periodic Benefit Cost    
Service cost $ 34 $ 31
Interest cost 32 32
Expected return on plan assets (41) (38)
Amortization of net actuarial loss (gain) 3 4
Settlements 2 2
Net periodic benefit cost 30 31
Pension Benefits | Int’l.    
Components of Net Periodic Benefit Cost    
Service cost 2 3
Interest cost 9 8
Expected return on plan assets (12) (11)
Amortization of net actuarial loss (gain) 0 0
Settlements 0 0
Net periodic benefit cost (1) 0
Other Benefits    
Components of Net Periodic Benefit Cost    
Service cost 0 0
Interest cost 2 2
Expected return on plan assets 0 0
Amortization of net actuarial loss (gain) (1) (1)
Settlements 0 0
Net periodic benefit cost $ 1 $ 1