Employee Compensation Plans (Details 3) (USD $)	12 Months Ended
Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011
Employee Stock Purchase Plan
Employee Compensation Plans
Average expected life	6 months	6 months	6 months
Average volatility (as a percent)	86.00%	70.00%	57.00%
Risk-free interest rate (as a percent)	0.13%	0.09%	0.19%
Weighted average fair value (in dollars per share)	$ 14.38	$ 11.61	$ 15.97
Stock options
Employee Compensation Plans
Average expected life	6 years	6 years	6 years
Average volatility (as a percent)	81.00%	69.00%	52.00%
Risk-free interest rate (as a percent)	1.02%	1.31%	2.37%
Weighted average fair value (in dollars per share)	$ 31.23	$ 30.10	$ 29.34
Stock options \| 2006 Plan \| Minimum
Employee Compensation Plans
Vesting period of award	3 years
Stock options \| 2006 Plan \| Maximum
Employee Compensation Plans
Vesting period of award	5 years
RSUs/RSAs \| 2006 Plan \| Minimum
Employee Compensation Plans
Vesting period of award	3 years
RSUs/RSAs \| 2006 Plan \| Maximum
Employee Compensation Plans
Vesting period of award	4 years
PSUs
Employee Compensation Plans
Vesting period of award	3 years

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

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

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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 S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

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

+ 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)(iv)

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

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- Definition

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

+ 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)(ii)

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

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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.

+ 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 (d)(1)

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

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