v3.26.1
Pension and Postretirement Plans
 3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
Pension and Postretirement Plans Pension and Postretirement Plans
The components of net periodic benefit cost for the three months ended March 31, 2026 and 2025, were as follows:
 Millions of Dollars
 Pension BenefitsOther Benefits
 202620252026 2025 
U.S.Int’l.U.S.Int’l.
Components of Net Periodic Benefit Cost
Three Months Ended March 31
Service cost$34 2 31 3 — — 
Interest cost32 9 32 8 2 2 
Expected return on plan assets(41)(12)(38)(11)— — 
Amortization of net actuarial loss (gain)3 — 4 — (1)(1)
Settlements2 — 2 — — — 
Net periodic benefit cost*$30 (1)31 — 1 1 
* Included within the “Operating expenses” and “Selling, general and administrative expenses” line items on our consolidated statement of income.


During the three months ended March 31, 2026, we contributed $10 million to our U.S. pension and other postretirement benefit plan. We currently expect to make additional contributions of approximately $190 million to our U.S. pension and other postretirement benefit plans and approximately $4 million to our international pension plans during the remainder of 2026. Cash contributions are included within the “Other” line item of the “Cash Flows From Operating Activities” section of our consolidated statement of cash flows.