FAIR VALUE MEASUREMENTS (Fair value of financial assets and liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	$ 587,981	$ 521,788
Investments	9,105	3,252
Total Assets	597,086	525,040
Fair Value, Measurements, Recurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	597,086	525,040
Fair Value, Measurements, Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	0	0
Fair Value, Measurements, Recurring [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	0	0
Fair Value, Measurements, Recurring [Member] \| Total [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Assets	597,086	525,040
Fair Value, Measurements, Recurring [Member] \| Cash [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	130,668	113,295
Fair Value, Measurements, Recurring [Member] \| Cash [Member] \| Significant Other Observable 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] \| Significant Unobservable 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 [Member] \| Total [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	130,668	113,295
Fair Value, Measurements, Recurring [Member] \| Cash equivalents, Money market funds [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	295,529	226,272
Fair Value, Measurements, Recurring [Member] \| Cash equivalents, Money market funds [Member] \| Significant Other Observable 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] \| Significant Unobservable 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] \| Total [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	295,529	226,272
Fair Value, Measurements, Recurring [Member] \| Cash equivalents, Time deposits [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	132,284	182,221
Fair Value, Measurements, Recurring [Member] \| Cash equivalents, Time deposits [Member] \| Significant Other Observable 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] \| Significant Unobservable 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] \| Total [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	132,284	182,221
Fair Value, Measurements, Recurring [Member] \| Commercial Paper [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	29,500
Fair Value, Measurements, Recurring [Member] \| Commercial Paper [Member] \| Significant Other Observable 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] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	0
Fair Value, Measurements, Recurring [Member] \| Commercial Paper [Member] \| Total [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents	29,500
Fair Value, Measurements, Recurring [Member] \| Short-term investments, Time deposits [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments	9,105	3,252
Fair Value, Measurements, Recurring [Member] \| Short-term investments, Time deposits [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Short-term investments, Time deposits [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] \| Short-term investments, Time deposits [Member] \| Total [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investments	$ 9,105	$ 3,252