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Stock-Based Compensation - Additional Information 1 (Detail) (USD $) | 1 Months Ended | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2012 Employees | Sep. 27, 2014 | Sep. 27, 2014 Stock Options [Member] Installment | Sep. 28, 2013 Stock Options [Member] | Sep. 29, 2012 Stock Options [Member] | Sep. 27, 2014 Restricted Stock Awards [Member] Installment | Sep. 28, 2013 Restricted Stock Awards [Member] | Sep. 29, 2012 Restricted Stock Awards [Member] | Sep. 24, 2011 Restricted Stock Awards [Member] | Sep. 26, 2009 Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |
Number of affected employees | 250 |  |  |  |  |  |  |  |  |
Percentage of shares covered by performance-based awards | 20.00% |  |  |  |  |  |  |  |  |
Recorded additional compensation cost | $ 0 |  |  |  |  |  |  |  |  |
Percentage of options granted |  |  |  |  |  |  |  |  |  | 60.00%
Unvested options |  | 4,000,000 |  |  |  |  |  |  |  |
Options subject to performance based vesting criteria |  | 700,000 |  |  |  |  |  |  |  |
Number of vesting installments |  |  | 4 |  |  | 4 |  |  |  |
Expiration period approximately |  |  | 6 years |  |  |  |  |  |  |
Expected life of option award |  |  | 3 years 6 months | 3 years 6 months | 3 years 6 months |  |  |  |  |
Stock price volatility |  |  | 34.30% | 34.80% | 37.90% |  |  |  |  |
Risk free interest rates |  |  | 1.60% | 1.20% | 0.90% |  |  |  |  |
Dividend during expected term |  | $ 0 |  |  |  |  |  |  |  |
Weighted average grant date fair value of options granted |  |  | $ 1.93 | $ 1.72 | $ 2.72 |  |  |  |  |
Total intrinsic value of options exercised |  |  | 1,400,000 | 1,100,000 | 5,100,000 |  |  |  |  |
Total unrecognized compensation cost related to nonvested stock options |  |  | 5,100,000 |  |  | 10,100,000 |  |  |  |
Nonvested stock options remaining weighted average vesting period |  |  | 2 years |  |  | 2 years |  |  |  |
Restricted stock awards outstanding, shares |  |  |  |  |  | 1,609,000 | 894,000 | 785,000 | 804,000 |
Share based payment award vesting conditional period of employment |  |  |  |  |  | 1 year |  |  |  |
Bonus earned in vested shares |  |  |  |  |  | 6,400,000 |  |  |  |
Share based payment award, shares granted and vested |  |  |  |  |  | 570,000 |  |  |  |
Granted, Weighted Average Grant Date Fair Value per Share |  |  |  |  |  | $ 7.98 | $ 9.26 | $ 9.16 |  |
Aggregate fair value as of the vesting date of restricted shares |  |  |  |  |  | $ 1,700,000 | $ 3,400,000 | $ 900,000 |  |

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted And Vested In Period + References No definition available. + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of dividends expected to be paid to holders of the underlying shares or contracted instruments over the term of the instruments life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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 + Details
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- Definition 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. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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 + Details
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- Definition An excess of the fair value of the modified award over the fair value of the award immediately before the modification. + 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 (h)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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