Marketable Securities (Estimated Fair Value Of Investments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2014	Jun. 29, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	$ 1,013,572	$ 890,009
Unrealized Gain	71	568
Unrealized (Loss)	(460)	(11)
Fair Value	1,013,183us-gaap_AvailableForSaleSecurities	890,566us-gaap_AvailableForSaleSecurities
Cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	76,606	35,102
Fair Value	76,606	35,102
Marketable securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	936,966	854,907
Unrealized Gain	71	568
Unrealized (Loss)	(460)	(11)
Fair Value	936,577	855,464
U.S. Treasury securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	422,278	426,777
Unrealized Gain	49	455
Unrealized (Loss)	(169)	(2)
Fair Value	422,158	427,230
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	178,867	133,131
Unrealized Gain	2	46
Unrealized (Loss)	(154)	(2)
Fair Value	178,715	133,175
Municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	106,590	60,267
Unrealized Gain	10	49
Unrealized (Loss)	(94)	(4)
Fair Value	106,506	60,312
Corporate debt securities and other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	281,424	253,429
Unrealized Gain	10	18
Unrealized (Loss)	(43)	(3)
Fair Value	281,391	253,444
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis, Total	24,413	16,405
Fair Value	$ 24,413	$ 16,405

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

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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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-Publisher FASB

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-Topic 210

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