Gross Fair Value of Derivative Positions (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Oct. 01, 2011
Current Assets
Derivatives, Fair Value [Line Items]
Derivatives assets	$ 247		$ 237
Total derivatives assets	160	[1]	126	[1]
Current Assets | Netting
Derivatives, Fair Value [Line Items]
Derivatives assets	(87)		(111)
Current Assets | Derivatives designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives assets	178		133
Current Assets | Derivatives designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Derivatives assets			1
Current Assets | Derivatives not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives assets	69		103
Other Assets
Derivatives, Fair Value [Line Items]
Derivatives assets	496		475
Total derivatives assets	472	[1]	419	[1]
Other Assets | Netting
Derivatives, Fair Value [Line Items]
Derivatives assets	(24)		(56)
Other Assets | Derivatives designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives assets	78		33
Other Assets | Derivatives designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Derivatives assets	224		213
Other Assets | Derivatives not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives assets	194		229
Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(99)		(152)
Total derivatives liabilities	(12)	[1]	(41)	[1]
Other Accrued Liabilities | Netting
Derivatives, Fair Value [Line Items]
Derivatives liabilities	87		111
Other Accrued Liabilities | Derivatives designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(58)		(100)
Other Accrued Liabilities | Derivatives designated as hedges | Other derivatives
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(3)		(1)
Other Accrued Liabilities | Derivatives not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(38)		(51)
Other Long-Term Liabilities
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(33)		(129)
Total derivatives liabilities	(9)	[1]	(73)	[1]
Other Long-Term Liabilities | Netting
Derivatives, Fair Value [Line Items]
Derivatives liabilities	24		56
Other Long-Term Liabilities | Derivatives designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(33)		(90)
Other Long-Term Liabilities | Derivatives not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Derivatives liabilities			(21)
Other Long-Term Liabilities | Derivatives not designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Derivatives liabilities			$ (18)

[1] Refer to Note 12 for further information on derivative fair values and counterparty netting.