Assets and Liabilities Measured at Fair Value (Detail) (Fair Value, Measurements, Recurring, USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Oct. 01, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 105		$ 186
Total	716		657
Borrowings disclosed at fair value	15,621		14,151
Residual Interests			40
Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	224	[1]	214	[1]
Derivatives liabilities			(18)	[1]
Foreign exchange
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	519	[1]	498	[1]
Derivatives liabilities	(129)	[1]	(262)	[1]
Other derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives liabilities	(3)	[1]	(1)	[1]
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	105		143
Total	105		143
Borrowings disclosed at fair value	8,580		8,953
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments			43
Total	611		474
Borrowings disclosed at fair value	3,823		2,128
Level 2 | Interest rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	224	[1]	214	[1]
Derivatives liabilities			(18)	[1]
Level 2 | Foreign exchange
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives assets	519	[1]	498	[1]
Derivatives liabilities	(129)	[1]	(262)	[1]
Level 2 | Other derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives liabilities	(3)	[1]	(1)	[1]
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total			40
Borrowings disclosed at fair value	3,218		3,070
Residual Interests			$ 40

[1] The Company has a master netting arrangement by counterparty with respect to certain derivative contracts. Contracts in a liability position totaling $111 million and $167 million have been netted against contracts in an asset position in the Condensed Consolidated Balance Sheets at June 30, 2012 and October 1, 2011, respectively.