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Pension and Postretirement Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Schedule of net periodic benefit cost (benefit) The other components of net periodic benefit cost are reflected in other expense (income), net. Components of net periodic benefit cost and other supplemental information for the three months ended March 31, 2023 and 2022 follow:
Benefit Plan Information
Three months ended March 31,
Qualified and Non-qualified
Pension Benefits
Postretirement
Benefits
United StatesInternational
(Millions)202320222023202220232022
Net periodic benefit cost (benefit)
Operating expense
Service cost $43 $64 $19 $35 $6 $11 
Non-operating expense
Interest cost 166 104 55 32 22 13 
Expected return on plan assets (244)(241)(75)(72)(19)(18)
Amortization of transition asset —  —  — 
Amortization of prior service benefit(6)(6)1 — (8)(7)
Amortization of net actuarial loss 73 106 2 11 2 10 
Settlements, curtailments, special termination benefits and other  —  —  
Total non-operating expense (benefit)(11)(37)(17)(29)(3)(1)
Total net periodic benefit cost (benefit) $32 $27 $2 $$3 $10