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Investments (Contractual Maturities of Marketable Investments) (Details) (USD $) In Thousands	Sep. 25, 2011	Jun. 26, 2011
Schedule of Available-for-sale Securities [Line Items]
Within One Year	$ 196,337
After One, Within Five Years	296,718
After Five, Within Ten Years	0
After Ten Years	0
Total	493,055	695,199
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	69,171
After One, Within Five Years	150,611
After Five, Within Ten Years	0
After Ten Years	0
Total	219,782
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	71,676
After One, Within Five Years	100,797
After Five, Within Ten Years	0
After Ten Years	0
Total	172,473
Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	38,001
After One, Within Five Years	5,004
After Five, Within Ten Years	0
After Ten Years	0
Total	43,005
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	7,146
After One, Within Five Years	0
After Five, Within Ten Years	0
After Ten Years	0
Total	7,146
U.S. Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	10,343
After One, Within Five Years	39,291
After Five, Within Ten Years	0
After Ten Years	0
Total	49,634
Non-U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	0
After One, Within Five Years	1,015
After Five, Within Ten Years	0
After Ten Years	0
Total	$ 1,015

X

- Definition

This item represents the fair value of debt securities which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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