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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost
Millions of Dollars
Pension Benefits
Other Benefits
2025202420252024
U.S.
Int'l.
U.S.
Int'l.
Components of net periodic benefit cost
Three Months Ended September 30
Service cost
$15 7 12  — 
Interest cost
24 32 19 28 2 
Expected return on plan assets
(20)(46)(16)(41)
Amortization of prior service cost (credit)
 1 — — (7)(10)
Recognized net actuarial loss (gain)
3 12 15  — 
Net periodic benefit cost
$22 6 16 11 (5)(9)
Nine Months Ended September 30
Service cost$44 23 37 28 1 
Interest cost
70 94 57 85 6 
Expected return on plan assets
(58)(135)(49)(122)
Amortization of prior service cost (credit)
 2 — — (19)(29)
Recognized net actuarial loss (gain)
8 35 43  — 
Settlements
 1 — — 
Net periodic benefit cost$64 20 50 34 (12)(24)
Summary of Severance Accruals
The following table summarizes our severance accrual activity for the nine-month period ended September 30, 2025:
Millions of Dollars
Balance at December 31, 2024
$331 
Accruals244
Benefit payments(239)
Foreign currency translation adjustment2 
Balance at September 30, 2025
$338