Equity Plans - Share Based Compensation (Details) - $ / shares shares in Millions	3 Months Ended	6 Months Ended
Mar. 02, 2017	Mar. 03, 2016	Mar. 02, 2017	Mar. 03, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future awards (in shares)	72		72
Stock options
Stock Options [Abstract]
Stock options granted (in shares)	4	5	6	7
Weighted-average grant-date fair values per share (in dollars per share)	$ 8.37	$ 6.59	$ 8.15	$ 7.01
Average expected life (in years)	5 years 6 months	5 years 6 months	5 years 6 months	5 years 6 months
Weighted-average expected volatility (in hundredths)	47.00%	47.00%	47.00%	47.00%
Weighted-average risk-free interest rate (in thousandths)	1.90%	1.70%	1.80%	1.70%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Restricted stock awards
Restricted Stock and Restricted Stock Units (Restricted Stock Awards)
Restricted stock awards granted (in shares)	5	6	8	9
Weighted-average grant-date fair values per share (in dollars per share)	$ 18.67	$ 14.71	$ 18.52	$ 15.84

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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- Definition

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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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

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

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- Definition

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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

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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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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