Pension and Other Benefit Programs - Accumulated Other Comprehensive Loss, Before Tax, not yet Recognized in Net Periodic Benefit Cost (Detail) $ in Millions	Sep. 28, 2024 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Prior Service Cost (Benefit)	$ (459)
Net actuarial loss (gain)	2,773
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	2,314
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Prior Service Cost (Benefit)	8
Net actuarial loss (gain)	2,963
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	2,971
Postretirement Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Prior Service Cost (Benefit)	(467)
Net actuarial loss (gain)	(190)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (657)