Investments (Summary of Marketable Investments by Type) (Details) - USD ($) $ in Thousands	Jun. 28, 2015	Jun. 29, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 572,160	$ 870,993
Gross Unrealized Gains	1,820	4,775
Gross Unrealized Losses	(499)	(126)
Estimated Fair Value	573,481	875,642
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	194,123	291,869
Gross Unrealized Gains	988	2,323
Gross Unrealized Losses	(341)	(12)
Estimated Fair Value	194,770	294,180
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	152,831	200,177
Gross Unrealized Gains	832	2,283
Gross Unrealized Losses	(158)	(114)
Estimated Fair Value	153,505	202,346
U.S. agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	18,994
Gross Unrealized Gains	0	141
Gross Unrealized Losses	0	0
Estimated Fair Value	0	19,135
Non-U.S. certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	225,206	352,928
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	225,206	352,928
Non-U.S. government securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	7,025
Gross Unrealized Gains	0	28
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 0	$ 7,053

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

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