Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) (USD $) In Millions	Oct. 01, 2011		Oct. 02, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]
Market value adjustments for hedges and investments	$ (48)		$ (95)
Foreign currency translation and other	43		80
Unrecognized pension and postretirement medical expense	(2,625)		(1,866)
Accumulated other comprehensive loss	$ (2,630)	[1]	$ (1,881)	[1]

[1] Accumulated other comprehensive income (loss) and components of other comprehensive income (loss) are recorded net of tax using a 37% estimated statutory tax rate