Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

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- Definition

This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities within one year of the balance sheet date or the normal operating cycle, whichever is longer; such investments are measured at amortized cost (carrying value). The held-to-maturity category is for those securities that the Entity has the positive intent and ability to hold until maturity.

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- Definition

This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities more than one year from the balance sheet date or operating cycle, if longer; such investments are measured at amortized cost (carrying value). The held-to-maturity category is for those securities that the Entity has the positive intent and ability to hold until maturity.

+ References+ Details

- Definition

Before tax and reclassification adjustments amount of unrealized holding gain (loss) and transfers on available-for-sale securities.

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+ Details

Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012	Dec. 30, 2012
Marketable securities:
Total long-term marketable securities	$ 190,841		$ 4,444
Unrealized (loss)/gain on available-for-sale security, before tax	(1,374)	7,014
Brightcove, Inc. [Member]
Marketable securities:
Unrealized (loss)/gain on available-for-sale security, before tax	(1,374)
Marketable debt securities [Member]
Marketable securities:
Short-term marketable securities	366,805		134,820
Long-term marketable securities	187,772		0
Marketable debt securities [Member] \| Maximum [Member]
Marketable securities:
Term of securities	34 months
Marketable debt securities [Member] \| Minimum [Member]
Marketable securities:
Term of securities	1 month
Marketable equity security [Member]
Marketable securities:
Available-for-sale security	3,069		4,444
Available-for-sale Securities [Member] \| Brightcove, Inc. [Member]
Marketable securities:
Unrealized loss on available-for-sale security, net of tax	(811)
U.S. Treasury securities [Member] \| Marketable debt securities [Member]
Marketable securities:
Short-term marketable securities	209,320		124,831
Corporate debt securities [Member] \| Marketable debt securities [Member]
Marketable securities:
Short-term marketable securities	62,634		0
Long-term marketable securities	111,473		0
U.S. agency securities [Member] \| Marketable debt securities [Member]
Marketable securities:
Short-term marketable securities	55,461		0
Long-term marketable securities	56,998		0
Municipal securities [Member] \| Marketable debt securities [Member]
Marketable securities:
Short-term marketable securities	23,094		0
Long-term marketable securities	19,301		0
Certificates of deposit [Member] \| Marketable debt securities [Member]
Marketable securities:
Short-term marketable securities	6,561		0
Commercial paper [Member] \| Marketable debt securities [Member]
Marketable securities:
Short-term marketable securities	$ 9,735		$ 9,989