Other Comprehensive Income Related to Derivatives, Net of Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 31, 2011	Dec. 25, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in fair value of derivatives	$ 87	$ (43)
Adjustment for net gains/losses realized and included in net income	(154)	286
Change in unrecognized gains/losses on derivative instruments	$ (67)	$ 243

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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