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Retirement Plans (Tables)
3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension Benefit/Cost
The components of our net periodic pension benefit/cost were as follows:
Millions, for the three months ended March 31,20252024
Service cost$11 $13 
Interest cost45 46 
Expected return on plan assets(60)(63)
Amortization of actuarial loss2 
Net periodic pension (benefit)/cost$(2)$(2)