Available for Sale and Held to Maturity Investments (Detail) (USD $) In Millions, unless otherwise specified	Nov. 25, 2012	Sep. 02, 2012
Available For Sale And Held To Maturity [Line Items]
Available-for-sale debt maturities, cost basis	$ 739
Held-to-maturity, cost basis	935
Total available-for-sale, Recorded Basis	744
Total investments, Recorded Basis	1,679	1,326
Held-to-maturity, Recorded Basis	935
Short-term Investments
Available For Sale And Held To Maturity [Line Items]
Unrealized gains	5	6
Total investments, Recorded Basis	1,679	1,326
Total investments, Cost Basis	1,674	1,320
Short-term Investments \| US Treasury and Government
Available For Sale And Held To Maturity [Line Items]
Available-for-sale debt maturities, cost basis	693	776
Unrealized gains	5	6
Total available-for-sale, Recorded Basis	698	782
Short-term Investments \| Corporate Debt Securities
Available For Sale And Held To Maturity [Line Items]
Available-for-sale debt maturities, cost basis	3	54
Unrealized gains	0	0
Total available-for-sale, Recorded Basis	3	54
Short-term Investments \| FDIC-Insured Corporate Bonds
Available For Sale And Held To Maturity [Line Items]
Available-for-sale debt maturities, cost basis	36	35
Unrealized gains	0	0
Total available-for-sale, Recorded Basis	36	35
Short-term Investments \| Asset and Mortgage Backed Securities
Available For Sale And Held To Maturity [Line Items]
Available-for-sale debt maturities, cost basis	7	8
Unrealized gains	0	0
Total available-for-sale, Recorded Basis	7	8
Short-term Investments \| Available-for-sale Securities
Available For Sale And Held To Maturity [Line Items]
Available-for-sale debt maturities, cost basis	739	873
Unrealized gains	5	6
Total available-for-sale, Recorded Basis	744	879
Short-term Investments \| Held-to-maturity Securities \| Certificates of Deposit
Available For Sale And Held To Maturity [Line Items]
Held-to-maturity, cost basis	935	447
Held-to-maturity, Recorded Basis	$ 935	$ 447

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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+ Details

- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References+ Details

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details