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Pensions and Other Postretirement Benefits
 6 Months Ended
Jun. 30, 2023
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefits Pensions and Other Postretirement Benefits
Three Months Ended June 30, 2023Three Months Ended June 30, 2022
Pension BenefitsGlobal OPEB PlansPension BenefitsGlobal OPEB Plans
U.S.Non-U.S.U.S.Non-U.S.
Service cost$43 $42 $2 $58 $33 $4 
Interest cost568 176 59 323 74 37 
Expected return on plan assets(730)(184)— (750)(135)— 
Amortization of prior service cost (credit)— — (1)— 1 (2)
Amortization of net actuarial (gains) losses— 9 (5)4 34 17 
Net periodic pension and OPEB (income) expense$(119)$43 $55 $(365)$7 $56 

Six Months Ended June 30, 2023Six Months Ended June 30, 2022
Pension BenefitsGlobal OPEB PlansPension BenefitsGlobal OPEB Plans
U.S.Non-U.S.U.S.Non-U.S.
Service cost$87 $84 $4 $116 $68 $8 
Interest cost1,136 337 118 646 150 74 
Expected return on plan assets(1,460)(352)— (1,500)(274)— 
Amortization of prior service cost (credit)(1)1 (1)(1)2 (3)
Amortization of net actuarial (gains) losses— 17 (11)9 69 34 
Net periodic pension and OPEB (income) expense$(238)$87 $110 $(730)$15 $113 
The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income of $86 million and $376 million in the three months ended June 30, 2023 and 2022 and $172 million and $752 million in the six months ended June 30, 2023 and 2022 are presented in Interest income and other non-operating income, net.