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FAIR VALUE MEASUREMENTS (Fair value of financial assets and liabilities) (Details) - USD ($)	Oct. 03, 2015	Sep. 27, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	$ 498,614,000	$ 587,981,000
Investments		9,105,000
Total Assets		597,086,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	498,614,000	597,086,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	498,614,000	597,086,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	0	0
Fair Value, Measurements, Recurring [Member] | Cash [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	105,617,000	130,668,000
Fair Value, Measurements, Recurring [Member] | Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	105,617,000	130,668,000
Fair Value, Measurements, Recurring [Member] | Cash [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Cash [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Money market funds [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	155,715,000	295,529,000
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Money market funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	155,715,000	295,529,000
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Money market funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Money market funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Time deposits [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	237,282,000	132,284,000
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Time deposits [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	237,282,000	132,284,000
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Time deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Cash equivalents, Time deposits [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	$ 0	0
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents		29,500,000
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents		29,500,000
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents		0
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents		0
Fair Value, Measurements, Recurring [Member] | Short-term investments, Time deposits [Member] | Estimate of Fair Value Measurement [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments		9,105,000
Fair Value, Measurements, Recurring [Member] | Short-term investments, Time deposits [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments		9,105,000
Fair Value, Measurements, Recurring [Member] | Short-term investments, Time deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments		0
Fair Value, Measurements, Recurring [Member] | Short-term investments, Time deposits [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments		$ 0

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 820



-SubTopic 10



-Section 50



-Paragraph 2



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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Cash



-URI http://asc.fasb.org/extlink&oid=6506951



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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Trading Securities



-URI http://asc.fasb.org/extlink&oid=6526789



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-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 1



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