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Postretirement Benefits
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Postretirement Benefits Postretirement benefits
 
A.  Pension and postretirement benefit costs    
U.S. Pension
Benefits
Non-U.S. Pension
Benefits
Other
Postretirement
Benefits
March 31,March 31,March 31,
(Millions of dollars)202520242025202420252024
For the three months ended:
Components of net periodic benefit cost:
Service cost$— $— $11 $11 $16 $17 
Interest cost153 156 28 30 31 33 
Expected return on plan assets (180)(175)(40)(42)(2)(2)
Amortization of prior service cost (credit)— — — — (1)(3)
Net periodic benefit cost (benefit) 1
$(27)$(19)$(1)$(1)$44 $45 
1 The service cost component is included in Operating costs. All other components are included in Other income (expense).

We made $211 million of contributions to our pension and other postretirement plans during the three months ended March 31, 2025. We currently anticipate full-year 2025 contributions of approximately $354 million.
 
B.  Defined contribution benefit costs
 
Total company costs related to our defined contribution plans, which are included in Operating costs in the Consolidated Statement of Results of Operations, were as follows:
 
 Three Months Ended March 31,
(Millions of dollars)20252024
U.S. Plans 1
$154 $223 
Non-U.S. Plans33 30 
 $187 $253 
1 Includes costs related to our non-qualified deferred compensation plans. We utilize total return swaps to economically hedge this exposure to offset the related costs. See Note 5 for additional information.