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Employee Benefits (Tables)
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost
The components of net periodic benefit costs for 2025 and 2024 are as follows:
 Three Months Ended
September 30		Nine Months Ended
September 30
 2025202420252024
(Millions of dollars)(Millions of dollars)
Pension Benefits
United States
Service cost$92 $90 $271 $268 
Interest cost132 116 379 348 
Expected return on plan assets(197)(149)(544)(447)
Amortization of prior service costs (credits) 1 1 3 3 
Amortization of actuarial losses (gains)38 60 98 182 
Curtailment losses (gains)(1)
56 — 127 — 
Total United States122 118 334 354 
International
Service cost13 14 42 41 
Interest cost55 48 151 143 
Expected return on plan assets(53)(51)(148)(148)
Amortization of prior service costs (credits)2 3 8 8 
Amortization of actuarial losses (gains)9 5 33 14 
Total International26 19 86 58 
Net Periodic Pension Benefit Costs$148 $137 $420 $412 
Other Benefits(2)
Service cost$7 $8 $22 $25 
Interest cost25 24 75 74 
Amortization of prior service costs (credits)(6)(7)(17)(19)
Amortization of actuarial losses (gains)(4)(4)(13)(11)
Curtailment losses (gains)(1)— (1)— 
Net Periodic Other Benefit Costs$21 $21 $66 $69 
(1) Includes special termination benefits of $26 associated with Hess pension plans.
(2) Includes costs for U.S. and international OPEB plans. Obligations for plans outside the United States are not significant relative to the company’s total OPEB obligation.