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Pensions and Other Postretirement Benefits
 9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefits Pensions and Other Postretirement Benefits
Three Months Ended September 30, 2024Three Months Ended September 30, 2023
Pension BenefitsGlobal OPEB PlansPension BenefitsGlobal OPEB Plans
U.S.Non-U.S.U.S.Non-U.S.
Service cost$47 $40 $3 $44 $39 $3 
Interest cost533 112 56 568 184 59 
Expected return on plan assets(686)(116)— (730)(192)— 
Amortization of prior service cost (credit)16 1 — (1)1 — 
Amortization of net actuarial (gains) losses2 12 — — 8 (6)
Net periodic pension and OPEB (income) expense$(88)$49 $59 $(119)$40 $56 
Nine Months Ended September 30, 2024Nine Months Ended September 30, 2023
Pension BenefitsGlobal OPEB PlansPension BenefitsGlobal OPEB Plans
U.S.Non-U.S.U.S.Non-U.S.
Service cost$141 $110 $8 $131 $123 $7 
Interest cost1,599 373 170 1,704 521 177 
Expected return on plan assets(2,056)(384)— (2,190)(544)— 
Amortization of prior service cost (credit)46 3 (1)(2)2 (1)
Amortization of net actuarial (gains) losses6 35 — — 25 (17)
Net periodic pension and OPEB (income) expense$(264)$137 $177 $(357)$127 $166 

The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income presented in Interest income and other non-operating income, net are insignificant in the three months ended September 30, 2024 and 2023 and $149 million and $258 million in the nine months ended September 30, 2024 and 2023.