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Borrowings and Credit Arrangements - Additional Information (Detail) (USD $)
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3 Months Ended | 6 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||||||||||||||||
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Mar. 30, 2013
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Mar. 24, 2012
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Mar. 30, 2013
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Mar. 24, 2012
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Sep. 29, 2012
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Mar. 30, 2013
2013 Notes [Member]
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Mar. 30, 2013
Credit Agreement [Member]
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Mar. 30, 2013
Credit Agreement [Member]
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Mar. 30, 2013
Convertible Notes [Member]
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Sep. 29, 2012
Convertible Notes [Member]
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Dec. 10, 2007
Convertible Notes [Member]
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Feb. 14, 2013
Convertible Notes [Member]
2007 Notes [Member]
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Dec. 10, 2007
Convertible Notes [Member]
2007 Notes [Member]
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Mar. 30, 2013
Convertible Notes [Member]
2013 Notes [Member]
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Mar. 30, 2013
Convertible Notes [Member]
2013 Notes [Member]
Minimum [Member]
D
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Mar. 30, 2013
Convertible Notes [Member]
2013 Notes [Member]
Maximum [Member]
D
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Aug. 01, 2012
Senior Notes [Member]
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Mar. 30, 2013
Senior Notes [Member]
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Mar. 30, 2013
Senior Notes [Member]
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Mar. 30, 2013
Term Loan A [Member]
Credit Agreement [Member]
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Mar. 30, 2013
Term Loan A [Member]
Credit Agreement [Member]
Percentage Added To Base Rate [Member]
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Mar. 30, 2013
Term Loan A [Member]
Credit Agreement [Member]
Percentage Added To Eurodollar Rate [Member]
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Mar. 30, 2013
Term Loan A [Member]
Revolving Credit Facility [Member]
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Nov. 18, 2010
November 18, 2010 [Member]
Convertible Notes [Member]
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Nov. 18, 2010
November 18, 2010 [Member]
Convertible Notes [Member]
2007 Notes [Member]
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Mar. 24, 2012
February 29, 2012 [Member]
Convertible Notes [Member]
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Feb. 29, 2012
February 29, 2012 [Member]
Convertible Notes [Member]
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Feb. 29, 2012
February 29, 2012 [Member]
Convertible Notes [Member]
2007 Notes [Member]
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Feb. 14, 2013
February 14, 2013 [Member]
Convertible Notes [Member]
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Feb. 14, 2013
February 14, 2013 [Member]
Convertible Notes [Member]
2007 Notes [Member]
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Mar. 30, 2013
2007 Notes [Member]
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Mar. 30, 2013
2007 Notes [Member]
Convertible Notes [Member]
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Mar. 30, 2013
December 15, 2017 [Member]
Convertible Notes [Member]
2013 Notes [Member]
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Mar. 30, 2013
Thereafter [Member]
Convertible Notes [Member]
2013 Notes [Member]
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Mar. 30, 2013
Term Loan B [Member]
Credit Agreement [Member]
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Mar. 30, 2013
Revolving Facility [Member]
Credit Agreement [Member]
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| Schedule Of Borrowings [Line Items] | ||||||||||||||||||||||||||||||||||||
| Carrying value of debt | $ 5,004,696,000 | $ 5,004,696,000 | $ 5,035,614,000 | |||||||||||||||||||||||||||||||||
| Credit facilities maximum borrowings | 1,000,000,000 | 1,500,000,000 | 300,000,000 | |||||||||||||||||||||||||||||||||
| Debt instrument maturity date | Aug. 01, 2020 | Aug. 01, 2017 | Aug. 01, 2019 | Aug. 01, 2017 | ||||||||||||||||||||||||||||||||
| Applicable margin on refinanced Term Loan | 1.00% | |||||||||||||||||||||||||||||||||||
| Applicable margin on refinanced Revolving Facility | 1.00% | |||||||||||||||||||||||||||||||||||
| Outstanding of principal amount after refinancing | 975,000,000 | |||||||||||||||||||||||||||||||||||
| Debt instrument base rate | 1.00% | 2.00% | ||||||||||||||||||||||||||||||||||
| Loss on extinguishment of debt | 3,200,000 | |||||||||||||||||||||||||||||||||||
| Refinancing issuance costs | 2,400,000 | |||||||||||||||||||||||||||||||||||
| Interest rates under Term Loans | 3.78% | 3.88% | ||||||||||||||||||||||||||||||||||
| Interest rates under Term Loans | 2.20% | 4.50% | ||||||||||||||||||||||||||||||||||
| Interest expense | 28,500,000 | 58,600,000 | 16,000,000 | 32,100,000 | ||||||||||||||||||||||||||||||||
| Non-cash interest expense amortization of debt discount and deferred financing costs | 16,200,000 | 18,921,000 | 41,387,000 | 38,881,000 | 4,100,000 | 7,800,000 | 400,000 | 800,000 | ||||||||||||||||||||||||||||
| Interest rate | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% | 6.25% | 2.00% | 2.00% | 2.00% | ||||||||||||||||||||||||||
| Maturity period | 2037 | 2020 | 2037 | 2042 | 2043 | |||||||||||||||||||||||||||||||
| Notes principal amount | 1,725,000,000 | 1,725,000,000 | 405,000,000 | 1,725,000,000 | 450,000,000 | 500,000,000 | 500,000,000 | 370,000,000 | 370,000,000 | 405,000,000 | ||||||||||||||||||||||||||
| Loss on extinguishment of debt | 3,247,000 | 42,347,000 | 3,247,000 | 42,347,000 | 42,300,000 | |||||||||||||||||||||||||||||||
| Fair value of conversion option | 32,500,000 | |||||||||||||||||||||||||||||||||||
| Estimated effective interest rate | 5.42% | 3.25% | ||||||||||||||||||||||||||||||||||
| Direct cost incurred | 4,100,000 | |||||||||||||||||||||||||||||||||||
| Principal payable, beginning date | Dec. 15, 2017 | |||||||||||||||||||||||||||||||||||
| Repurchase price of notes | 100.00% | |||||||||||||||||||||||||||||||||||
| Redemption price of notes | 100.00% | |||||||||||||||||||||||||||||||||||
| Put dates on convertible notes | Holders may require the Company to repurchase the 2013 Notes on each of December 15,2017,2022, 2027, 2032 and 2037 | |||||||||||||||||||||||||||||||||||
| Rate principal accretion | 4.00% | 2.00% | ||||||||||||||||||||||||||||||||||
| Percent by which trading price of notes exceeds accreted principal resulting in contingent interest | 120.00% | |||||||||||||||||||||||||||||||||||
| Conversion price of common stock | $ 38.59 | |||||||||||||||||||||||||||||||||||
| Sales price exceeds conversion price, percentage | 130.00% | |||||||||||||||||||||||||||||||||||
| Number of days the sales price exceeds conversion price | 20 | 30 | ||||||||||||||||||||||||||||||||||
| Percent of trading price per note | 98.00% | |||||||||||||||||||||||||||||||||||
| Conversion description of notes in to common stock | During the five business day period after any five consecutive trading day period | |||||||||||||||||||||||||||||||||||
| Non convertible common stock in excess of principal amount | 1,000 | |||||||||||||||||||||||||||||||||||
| Cash paid to satisfy conversion obligations | $ 1,000 | |||||||||||||||||||||||||||||||||||