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Pensions and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefits Pensions and Other Postretirement Benefits
Three Months Ended March 31, 2024Three Months Ended March 31, 2023
Pension BenefitsGlobal OPEB PlansPension BenefitsGlobal OPEB Plans
U.S.Non-U.S.U.S.Non-U.S.
Service cost$47 $34 $3 $44 $42 $2 
Interest cost533 128 56 568 161 59 
Expected return on plan assets(685)(131)— (730)(168)— 
Amortization of prior service cost (credit)15 1 — (1)1 — 
Amortization of net actuarial (gains) losses2 12 — — 8 (6)
Net periodic pension and OPEB (income) expense$(88)$44 $59 $(119)$44 $55 
The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income of $49 million and $86 million in the three months ended March 31, 2024 and 2023 are presented in Interest income and other non-operating income, net.