Awards Granted, Weighted-Average Exercise Price, Weighted-Average Fair Value and Weighted-Average Assumptions Used in the Calculation of Compensation Expense (Detail) (USD $)	9 Months Ended
Jul. 01, 2012 Restricted shares	Jul. 01, 2012 Performance stock units	Jul. 03, 2011 Restricted Stock Awards and Restricted Stock Units	Jul. 03, 2011 Stock options and share appreciation rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Awards	1,559,961	350,000	1,774,313	3,024,480
Exercise price per award				$ 13.92
Fair value per award	$ 19.3	$ 17.7	$ 20.9	$ 7.1
Risk Free Rate				0.20%
Expected Dividend Yield				0.00%
Expected Life (Years)				1 year 1 month 6 days
Expected Volatility				41.90%

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.

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)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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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

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-Subparagraph (SAB TOPIC 14.D.2)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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- Definition

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

+ References

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- Definition

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.

+ References

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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

Number of share instruments newly issued under a share-based compensation plan.

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