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Investments (Tables)

12 Months Ended

Jun. 26, 2011

Jun. 27, 2010

Investments

Summary of Marketable Investments by Type

		June 26, 2011
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Estimated Fair Value
Municipal bonds		$	391,465			$	3,943			$	(10	)			395,398
Corporate bonds			207,241				2,312				(115	)			209,438
Municipal variable rate demand notes			295				—				—				295
U.S. agency securities			67,244				807				(2	)			68,049
Certificates of deposit			10,003				12				—				10,015
Commercial paper			4,999				—				—				4,999
Non-U.S. government securities			6,986				19				—				7,005
Total		$	688,233			$	7,093			$	(127	)		$	695,199

		June 27, 2010
		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Estimated Fair Value
Municipal bonds		$	441,653			$	3,502			$	(117	)		$	445,038
Corporate bonds			120,991				1,478				(20	)			122,449
Municipal variable rate demand notes			15,685				—				(1	)			15,684
U.S. agency securities			72,531				615				(32	)			73,114
U.S. government securities			7,533				76				—				7,609
Non-U.S. government securities			5,091				—				(11	)			5,080
Total		$	663,484			$	5,671			$	(181	)		$	668,974

Schedule of Investment Securities, Aggregated by Investment Type and Length of Time

		June 26, 2011
		Less than 12 Months								Greater than 12 Months								Total
		Fair Value				Unrealized Loss				Fair Value				Unrealized Loss				Fair Value				Unrealized Loss
Municipal bonds		$	14,348			$	(10	)		$	—			$	—			$	14,348			$	(10	)
Corporate bonds			20,484				(115	)			—				—				20,484				(115	)
Municipal variable rate demand notes			—				—				—				—				—				—
U.S. agency securities			6,518				(2	)			—				—				6,518				(2	)
Certificates of deposit			—				—				—				—				—				—
Commercial paper			—				—				—				—				—				—
Non-U.S. government securities			—				—				—				—				—				—
Total		$	41,350			$	(127	)		$	—			$	—			$	41,350			$	(127	)
Number of securities with an unrealized loss							20								—								20

		June 27, 2010
		Less than 12 Months								Greater than 12 Months								Total
		Fair Value				Unrealized Loss				Fair Value				Unrealized Loss				Fair Value				Unrealized Loss
Municipal bonds		$	117,470			$	(117	)		$	—			$	—			$	117,470			$	(117	)
Corporate bonds			11,126				(20	)			—				—				11,126				(20	)
Municipal variable rate demand notes			5,006				(1	)			—				—				5,006				(1	)
U.S. agency securities			5,120				(32	)			—				—				5,120				(32	)
U.S. government securities			—				—				—				—				—				—
Non-U.S. government securities			5,095				(11	)			—				—				5,095				(11	)
Total		$	143,817			$	(181	)		$	—			$	—			$	143,817			$	(181	)
Number of securities with an unrealized loss							42								—								42

Contractual Maturities of Marketable Investments

		Within One Year				After One, Within Five Years				After Five, Within Ten Years				After Ten Years				Total
Municipal bonds		$	149,533			$	245,865			$	—			$	—			$	395,398
Corporate bonds			79,127				130,311				—				—				209,438
Municipal variable rate demand notes			—				—				—				295				295
U.S. agency securities			9,262				58,787				—				—				68,049
Certificates of deposit			5,011				5,004				—				—				10,015
Commercial paper			4,999				—				—				—				4,999
Non-U.S. government securities			5,000				2,005				—				—				7,005
Total		$	252,932			$	441,972			$	—			$	295			$	695,199

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Tabular disclosure of 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.

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