Equity Plans - Share Based Compensation (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Aug. 29, 2013	Aug. 30, 2012	Sep. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock reserved for issuance for stock options and restricted stock awards (in shares)	160.2
Number of shares subject to outstanding awards (in shares)	83.8
Number of shares available for future awards (in shares)	76.4
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares outstanding (in shares)	95.7
Number of shares granted (in shares)	17.8
Number of shares excercised (in shares)	(22.8)
Number of shares cancelled or expired (in shares)	(19.9)
Number of shares outstanding (in shares)	70.8	95.7
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price per share for options outstanding (in dollars per share)	$ 8.42
Weighted average exercise price per share for options granted (in dollars per share)	$ 6.62
Weighted average exercise price per share for options exercised (in dollars per share)	$ 6.60
Weighted average exercise price per share for options cancelled or expired (in dollars per share)	$ 12.47
Weighted average exercise price per share for options outstanding (in dollars per share)	$ 7.41	$ 8.42
Share-based Compensation Arrangement by Share-based Payment Award Options, Outstanding, Additiona Disclosures [Abstract]
Weighted average remaining contractual term for options outstanding at August 29, 2013 (in years)	3 years 3 months
Aggregated intrinsic value for options outstanding at August 29, 2013	$ 439
Options exercisable at August 29, 2013 (in shares)	31.2
Weighted average exercise price per share for options exerciasble at August 29, 2013 (in dollars per share)	$ 8.21
Weighted average remaining contractual term for options exercisable at August 29, 2013 (in years)	1 year 10 months
Aggregated intrinsic value for options exercisable at August 29, 2013	170
Options expected to vest after August 29, 2013 (in shares)	37.6
Weighted average exercise price per share for options expected to vest after August 29, 2013 (in dollars per share)	$ 6.78
Weighted average remaining contractual term for options expected to vest after August 29, 2013 (in years)	4 years 5 months
Aggregated intrinsic value for options expected to vest after August 29, 2013	255
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Weighted-average grant-date fair values per share of options granted during period (in dollars per share)	$ 3.34	$ 3.18	$ 4.46
Total intrinsic value for option exercised	103	6	35
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Fair Value Assumptions, Method Used	Black-Scholes
Average expected life (in years)	5 years 1 month	5 years 1 month	5 years 1 month
Weighted-average expected volatility (in hundredths)	59.00%	66.00%	56.00%
Weighted-average risk-free interest rate (in hundredths)	0.70%	0.90%	1.80%
Restricted Stock Awards activity
Number of Shares - Outstanding (in shares)	9.4
Number of Shares - Granted (in shares)	6.6
Number of Shares - Restrictions lapsed (in shares)	(2.5)
Number of Shares - Cancelled (in shares)	(0.5)
Number of Shares - Outstanding (in shares)	13.0	9.4
Restricted awards expected to vest after August 29, 2013 (in shares)	11.9
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted Average Grant Date Fair Value Per Share - Outstanding (in dollars per share)	$ 6.87
Weighted Average Grant Date Fair Value Per Share - Granted (in dollars per share)	$ 6.23	$ 5.43	$ 8.72
Weighted Average Grant Date Fair Value Per Share - Restrictions lapsed (in dollars per share)	$ 7.06
Weighted Average Grant Date Fair Value Per Share - Cancelled (in dollars per share)	$ 7.29
Weighted Average Grant Date Fair Value Per Share - Outstanding (in dollars per share)	$ 6.49	$ 6.87
Weighted Average Grant Date Fair Value for restricted awards expected to vest after August 29, 2013 (in dollars per share)	$ 6.41
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Aggregate fair value of awards for which restrictions lapsed	$ 17	$ 32	$ 43
Service-based awards [Member]
Restricted Stock Awards activity
Number of Shares - Granted (in shares)	5.4	3.9	4.4
Performance-based shares [Member]
Restricted Stock Awards activity
Number of Shares - Granted (in shares)	1.2	1.9	1.2
Number of Shares - Outstanding (in shares)	3.4
Employee Stock Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option annual incremental vesting (percentage)	25.00%
General number of years from grant date until stock options expire (in years)	6 years
Employee Stock Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option annual incremental vesting (percentage)	33.00%
General number of years from grant date until stock options expire (in years)	10 years

General percentage of incremental vesting for stock options beginning one year from the date of grant.

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The number of outstanding awards expected to vest on nonstock option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

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The weighted average fair value of nonvested awards that expected to vest on share-based plans excluding option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

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The number of authorized shares that are subject to outstanding awards such as: 1) the number of shares already issued upon exercise of options or other share-based awards under the plan, and 2) shares reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of options expected to vest under the option plan as of the balance-sheet date.

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Number of options expected to vest.

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The weighted average exercise price for options expected to vest.

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The weighted average period between the balance-sheet date and expiration for all options expected to vest, which may be expressed in a decimal value for number of years.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset or liability could be bought or incurred or sold or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Weighted average expected volatility rate of share-based compensation awards.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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