Financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time, usually less than one year or the normal operating cycle, whichever is longer) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

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Debt securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time, usually less than one year or the normal operating cycle, whichever is longer) or for debt securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

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- Definition

Total common and preferred stock (which is neither mandatorily redeemable nor redeemable at the option of the holder) equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time, usually less than one year or the normal operating cycle, whichever is longer) or for equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of trading securities held at each balance sheet date, that was included in earnings for the period. Trading securities are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) and the change in net unrealized holding gain (loss) is included in earnings for the period.

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Trading Assets (Detail) (USD $) In Millions			3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended
Trading Assets (Detail) (USD $) In Millions	Oct. 01, 2011	Dec. 25, 2010	Sep. 25, 2010 Marketable Equity Securities [Member]	Sep. 25, 2010 Marketable Equity Securities [Member]	Oct. 01, 2011 Marketable Debt Instruments [Member]	Sep. 25, 2010 Marketable Debt Instruments [Member]	Oct. 01, 2011 Marketable Debt Instruments [Member]	Sep. 25, 2010 Marketable Debt Instruments [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Marketable debt instruments	$ 4,259	$ 4,705
Marketable equity securities	6	388
Total trading assets	4,265	5,093
Trading Securities, Change in Unrealized Holding Gain (Loss)			(129)	(91)	(89)	154	(37)	(11)
Net gains (losses) on derivatives related to trading securities					$ 81	$ (130)	$ 42	$ 4