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Net Periodic Benefit Cost (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 29, 2024 | Jul. 01, 2023 | Jun. 29, 2024 | Jul. 01, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | $ (99) | $ (87) | $ (302) | $ (257)
Pension Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service costs | 62 | 65 | 187 | 193
Interest costs | 209 | 195 | 626 | 586
Expected return on plan assets | (284) | (288) | (853) | (863)
Amortization of previously deferred service costs | 2 | 2 | 6 | 7
Recognized net actuarial loss | 5 | 5 | 15 | 14
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | (68) | (86) | (206) | (256)
Net periodic benefit cost (income) | (6) | (21) | (19) | (63)
Postretirement Medical Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service costs | 1 | 1 | 1 | 4
Interest costs | 14 | 20 | 41 | 61
Expected return on plan assets | (14) | (15) | (43) | (45)
Amortization of previously deferred service costs | (22) | 0 | (67) | 0
Recognized net actuarial loss | (9) | (6) | (27) | (17)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | (31) | (1) | (96) | (1)
Net periodic benefit cost (income) | $ (30) | $ 0 | $ (95) | $ 3

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