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Net Interest and Other Financial Costs
 6 Months Ended
Jun. 30, 2025
Other Income and Expenses [Abstract]  
Net Interest and Other Financial Costs Net Interest and Other Financial Costs
Net interest and other financial costs were as follows:
Three Months Ended 
June 30,		Six Months Ended 
June 30,
(Millions of dollars)2025202420252024
Interest income$(31)$(105)$(77)$(206)
Interest expense359 341 711 682 
Interest capitalized(22)(13)(40)(25)
Pension and other postretirement non-service costs(a)
6 (11)11 (22)
Investments - net premium (discount) amortization— (31)— (70)
Other financial costs7 13 18 14 
Net interest and other financial costs$319 $194 $623 $373 
(a)See Note 21.