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Investments (Summary of Short-term Investments by Type) (Details) - USD ($) $ in Thousands	Dec. 27, 2015	Jun. 28, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 524,258	$ 572,160
Gross Unrealized Gains	2,903	1,820
Gross Unrealized Losses	(594)	(499)
Estimated Fair Value	526,567	573,481
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	192,388	194,123
Gross Unrealized Gains	1,877	988
Gross Unrealized Losses	(134)	(341)
Estimated Fair Value	194,131	194,770
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	162,889	152,831
Gross Unrealized Gains	1,026	832
Gross Unrealized Losses	(460)	(158)
Estimated Fair Value	163,455	153,505
U.S. | Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	500	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	500	0
Non-US [Member] | Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	168,481	225,206
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 168,481	$ 225,206

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
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