Pension Benefit Obligations - Schedule of Reconciliation of Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 27, 2024	Sep. 29, 2023	Sep. 30, 2022
Change in benefit obligation
Benefit obligation at beginning of period	$ 292	$ 310	$ 422
Interest cost	17	16	9
Benefits paid from the plans	(22)	(21)	(21)
Actuarial (gain) loss	26	(13)	(100)
Benefit obligation at end of period	313	292	310
Change in plan assets
Fair value of plan assets at beginning of period	281	271	366
Actual return on plan assets	55	30	(74)
Employer contributions to plans	1	0	0
Benefits paid from the plans	(22)	(20)	(21)
Fair value of plan assets at end of period	315	281	271
Reconciliation of funded status:
Fair value of plan assets at end of year	315	281	271
Benefit obligation at end of year	313	292	310
Net amount recognized at end of year	$ 2	$ (11)	$ (39)

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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