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Pensions and Other Postretirement Benefits
 9 Months Ended
Sep. 30, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Pensions and Other Postretirement Benefits Pensions and Other Postretirement Benefits
 
We have both funded and unfunded defined benefit pension plans covering eligible employees. We also provide specified health care benefits to eligible retired employees; these plans can be amended or terminated at our option.  Under our self-insured retiree health care plan, for those participants who are not Medicare-eligible, certain health care expenses are covered for retired employees and their dependents, reduced by any deductibles, coinsurance, and, in some cases, coverage provided under other group insurance policies. Eligible retired participants and their spouses who are Medicare-eligible are not covered under the self-insured retiree health care plan, but instead are provided with an employer-funded health reimbursement account which can be used for reimbursement of health insurance premiums or eligible out-of-pocket medical expenses.

Pension and postretirement benefit cost components for the third quarter and first nine months were as follows:

 Pension BenefitsOther Postretirement Benefits
 Third Quarter
 2022202120222021
 ($ in millions)
Service cost$10 $10 $1 $1 
Interest cost17 14 3 1 
Expected return on plan assets(53)(48)(3)(3)
Amortization of net losses12 16 — — 
Amortization of prior service benefit— — (6)(6)
Net benefit$(14)$(8)$(5)$(7)
 Pension BenefitsOther Postretirement Benefits
 First Nine Months
 2022202120222021
 ($ in millions)
Service cost$30 $32 $4 $4 
Interest cost51 41 7 5 
Expected return on plan assets(160)(144)(9)(9)
Amortization of net losses36 49 — 1 
Amortization of prior service benefit— — (19)(19)
Net benefit$(43)$(22)$(17)$(18)
The service cost component of defined benefit pension cost and postretirement benefit cost are reported within “Compensation and benefits” and all other components of net benefit cost are presented in “Other income (expense) – net” on the Consolidated Statements of Income.