Investments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 1,278,137
Gross Unrealized Gains	1,107
Gross Unrealized Losses	(223)
Fair Value	1,279,021
Cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	75,127
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	75,127
Cash equivalents [Member] \| Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	64,156
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	64,156
Cash equivalents [Member] \| Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	10,971
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	10,971
Short-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	750,329
Gross Unrealized Gains	679
Gross Unrealized Losses	(113)
Fair Value	750,895
Short-term investments [Member] \| Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	86,339
Gross Unrealized Gains	44
Gross Unrealized Losses	(2)
Fair Value	86,381
Short-term investments [Member] \| Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	64,000
Gross Unrealized Gains	18
Gross Unrealized Losses	(40)
Fair Value	63,978
Short-term investments [Member] \| Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	599,990
Gross Unrealized Gains	617
Gross Unrealized Losses	(71)
Fair Value	600,536
Long-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	452,681
Gross Unrealized Gains	428
Gross Unrealized Losses	(110)
Fair Value	452,999
Long-term investments [Member] \| Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	5,700
Gross Unrealized Gains	2
Gross Unrealized Losses	(9)
Fair Value	5,693
Long-term investments [Member] \| Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	446,981
Gross Unrealized Gains	426
Gross Unrealized Losses	(101)
Fair Value	$ 447,306

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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