Derivative Instruments at Gross Fair Value (Detail) (Level 2, USD $) In Millions, unless otherwise specified	Mar. 28, 2015		Sep. 27, 2014
Foreign exchange contracts | Other Current Assets
Derivative assets:
Fair Value of Derivative Assets	$ 3,131	[1]	$ 1,554	[1]
Foreign exchange contracts | Accrued expenses
Derivative liabilities:
Fair Value of Derivative Liabilities	118	[2]	81	[2]
Interest rate contracts | Other Current Assets
Derivative assets:
Fair Value of Derivative Assets	329	[1]	81	[1]
Interest rate contracts | Accrued expenses
Derivative liabilities:
Fair Value of Derivative Liabilities	458	[2]
Derivatives Designated as Hedging Instruments | Foreign exchange contracts | Other Current Assets
Derivative assets:
Fair Value of Derivative Assets	3,045	[1]	1,332	[1]
Derivatives Designated as Hedging Instruments | Foreign exchange contracts | Accrued expenses
Derivative liabilities:
Fair Value of Derivative Liabilities	27	[2]	41	[2]
Derivatives Designated as Hedging Instruments | Interest rate contracts | Other Current Assets
Derivative assets:
Fair Value of Derivative Assets	329	[1]	81	[1]
Derivatives Designated as Hedging Instruments | Interest rate contracts | Accrued expenses
Derivative liabilities:
Fair Value of Derivative Liabilities	458	[2]
Not Designated as Hedging Instrument | Foreign exchange contracts | Other Current Assets
Derivative assets:
Fair Value of Derivative Assets	86	[1]	222	[1]
Not Designated as Hedging Instrument | Foreign exchange contracts | Accrued expenses
Derivative liabilities:
Fair Value of Derivative Liabilities	91	[2]	40	[2]
Not Designated as Hedging Instrument | Interest rate contracts | Other Current Assets
Derivative assets:
Fair Value of Derivative Assets	0	[1]	0	[1]
Not Designated as Hedging Instrument | Interest rate contracts | Accrued expenses
Derivative liabilities:
Fair Value of Derivative Liabilities	$ 0	[2]

[1] The fair value of derivative assets is measured using Level 2 fair value inputs and is recorded as other current assets in the Condensed Consolidated Balance Sheets.

[2] The fair value of derivative liabilities is measured using Level 2 fair value inputs and is recorded as accrued expenses in the Condensed Consolidated Balance Sheets.