Other Comprehensive Income Related to Derivatives, Net of Taxes (Detail) (USD $) In Millions	12 Months Ended
Sep. 24, 2011	Sep. 25, 2010	Sep. 26, 2009
Accumulated Other Comprehensive Income (Loss) [Line Items]
Changes in fair value of derivatives	$ 92	$ (180)	$ 204
Adjustment for net gains/losses realized and included in net income	450	(73)	(222)
Change in unrecognized gains/losses on derivative instruments	$ 542	$ (253)	$ (18)

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

Net of tax effect of the reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.

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Change in accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, net of tax effect. The after tax effect change includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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