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Pension and Postretirement Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
Components of net periodic benefit cost and other supplemental information for the three and nine months ended September 30, 2025 and 2024 are as follows:
Three months ended September 30,
Qualified and Non-qualified Pension Benefits
United StatesInternationalPostretirement Benefits
(Millions)202520242025202420252024
Net periodic benefit cost (benefit)
Service cost - Operating$$$$$$
Interest cost24 23 
Expected return on plan assets(31)(34)(6)(5)(2)(2)
Amortization of prior service benefit— (1)— — — (1)
Amortization of net actuarial loss16 14 — — 
Non-operating(1)— 
Total net periodic benefit cost (benefit)$15 $$$$$
Nine months ended September 30,
Qualified and Non-qualified Pension Benefits
United StatesInternationalPostretirement Benefits
(Millions)202520242025202420252024
Net periodic benefit cost (benefit)
Service cost - Operating$18 $14 $15 $14 $$
Interest cost72 46 15 15 
Expected return on plan assets(93)(68)(18)(15)(6)(4)
Amortization of prior service benefit— (2)— — — (2)
Amortization of net actuarial loss48 28 — — 
Non-operating27 (3)— 
Total net periodic benefit cost (benefit)$45 $18 $12 $14 $$