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POSTRETIREMENT BENEFIT PLANS | 3 Months Ended
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Mar. 31, 2024
Retirement Benefits [Abstract] |
POSTRETIREMENT BENEFIT PLANS | POSTRETIREMENT BENEFIT PLANS FAS income The pretax FAS income related to our qualified defined benefit pension plans and retiree medical and life insurance plans consisted of the following (in millions):
|  |  | Quarters Ended
|  |  |  |  | March 31, 2024 |  | March 26, 2023
Qualified defined benefit pension plans |  |  |  |  |  |  |  |  |  |  |
Operating: |  |  |  |  |  |  |  |  |  |  |
Service cost |  |  |  |  |  |  | $ | (15) |  |  |  | $ | (16) |  |
Non-operating: |  |  |  |  |  |  |  |  |  |  |
Interest cost |  |  |  |  |  |  | (349) |  |  |  | (365) |  |
Expected return on plan assets |  |  |  |  |  |  | 393 |  |  |  | 430 |  |
Amortization of actuarial losses |  |  |  |  |  |  | (65) |  |  |  | (42) |  |
Amortization of prior service credits |  |  |  |  |  |  | 37 |  |  |  | 87 |  |
Non-service FAS pension income |  |  |  |  |  |  | 16 |  |  |  | 110 |  |
Total FAS pension income |  |  |  |  |  |  | $ | 1 |  |  |  | $ | 94 |  |
Retiree medical and life insurance plans |  |  |  |  |  |  |  |  |  |  |
Operating: |  |  |  |  |  |  |  |  |  |  |
Service cost |  |  |  |  |  |  | $ | (1) |  |  |  | $ | (1) |  |
Non-operating: |  |  |  |  |  |  |  |  |  |  |
Interest cost |  |  |  |  |  |  | (16) |  |  |  | (17) |  |
Expected return on plan assets |  |  |  |  |  |  | 27 |  |  |  | 26 |  |
Amortization of actuarial gains |  |  |  |  |  |  | 9 |  |  |  | 8 |  |
Amortization of prior service costs |  |  |  |  |  |  | (1) |  |  |  | (3) |  |
Non-service FAS retiree medical and life income |  |  |  |  |  |  | 19 |  |  |  | 14 |  |
Total FAS retiree medical and life income |  |  |  |  |  |  | $ | 18 |  |  |  | $ | 13 |  |
We record the service cost component of FAS income for our qualified defined benefit pension plans and retiree medical and life insurance plans in the cost of sales accounts; the non-service components of our FAS income for our qualified defined benefit pension plans in the non-service FAS pension income account; and the non-service components of our FAS income for our retiree medical and life insurance plans as part of the other non-operating income, net account on our consolidated statements of earnings. The amortization of net actuarial losses or gains and prior service credits or costs in the table above, along with similar costs related to our other postretirement benefit plans ($4 million for the quarter ended March 31, 2024 and $3 million for the quarter ended March 26, 2023) were reclassified from accumulated other comprehensive loss (AOCL) and recorded as a component of FAS income for the periods presented. These costs totaled $24 million, ($19 million, net of tax) during the quarter ended March 31, 2024, and $(47) million ($(37) million, net of tax) during the quarter ended March 26, 2023. Funding Requirements The required funding of our qualified defined benefit pension plans is determined in accordance with the Employee Retirement Income Security Act of 1974 (ERISA), as amended, along with consideration of CAS and Internal Revenue Code rules. We made no contributions to our qualified defined benefit pension plans during the quarters ended March 31, 2024 and March 26, 2023.

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