Amounts included in Accumulated Other Comprehensive Loss, before tax, Expected to be recognized as Components of Net Periodic Benefit Cost during Fiscal 2012 (Detail) (One Year from Balance Sheet Date, USD $) In Millions	12 Months Ended
	Oct. 01, 2011
Defined Benefit Plan Disclosure [Line Items]
Prior service (cost) / credit	$ (9)
Net actuarial loss	(339)
Total	(348)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Prior service (cost) / credit	(11)
Net actuarial loss	(308)
Total	(319)
Postretirement Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Prior service (cost) / credit	2
Net actuarial loss	(31)
Total	$ (29)