Investments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 1,304,880	$ 1,314,641
Gross Unrealized Gains	979	863
Gross Unrealized Losses	(362)	(537)
Fair Value	1,305,497	1,314,967
Cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	73,108	92,335
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	73,108	92,335
Cash equivalents [Member] \| Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	52,684	68,267
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	52,684	68,267
Cash equivalents [Member] \| Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	20,424	24,068
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value	20,424	24,068
Short-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	723,105	719,271
Gross Unrealized Gains	643	529
Gross Unrealized Losses	(55)	(135)
Fair Value	723,693	719,665
Short-term investments [Member] \| Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	60,625	90,535
Gross Unrealized Gains	1	17
Gross Unrealized Losses	(1)	(2)
Fair Value	60,625	90,550
Short-term investments [Member] \| Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	81,500	86,500
Gross Unrealized Gains	17	15
Gross Unrealized Losses	(7)	(57)
Fair Value	81,510	86,458
Short-term investments [Member] \| Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	580,980	542,236
Gross Unrealized Gains	625	497
Gross Unrealized Losses	(47)	(76)
Fair Value	581,558	542,657
Long-term investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	508,667	503,035
Gross Unrealized Gains	336	334
Gross Unrealized Losses	(307)	(402)
Fair Value	508,696	502,967
Long-term investments [Member] \| Time deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	5,700	6,190
Gross Unrealized Gains	18	10
Gross Unrealized Losses	(3)	(3)
Fair Value	5,715	6,197
Long-term investments [Member] \| Government and corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	502,967	496,845
Gross Unrealized Gains	318	324
Gross Unrealized Losses	(304)	(399)
Fair Value	$ 502,981	$ 496,770

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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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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- Definition

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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