Financial Instruments, Short-term Investments (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Jun. 30, 2018
Available-for-sale Securities [Abstract]
Estimated Fair Value		$ 1,082,915
Available-for-sale Debt Securities, Amortized Cost Basis	$ 967,221	1,086,585
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	52	49
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	2,630	3,719
Available-for-sale Securities, Debt Securities	964,643
Certificates of deposit
Available-for-sale Securities [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	63,940	52,429
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0	1
Available-for-sale Securities, Debt Securities	63,940	52,428
Commercial paper
Available-for-sale Securities [Abstract]
Gross Unrealized Loss	0
Available-for-sale Debt Securities, Amortized Cost Basis	71,666	64,354
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax		0
Available-for-sale Securities, Debt Securities	71,666	64,354
Corporate debt securities
Available-for-sale Securities [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	347,147	369,734
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	52	39
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	1,530	2,008
Available-for-sale Securities, Debt Securities	345,669	367,765
U.S. Treasury securities
Available-for-sale Securities [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	484,468	600,068
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	0	10
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	1,100	1,710
Available-for-sale Securities, Debt Securities	$ 483,368	$ 598,368

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

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This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

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-Publisher FASB
-Name Accounting Standards Codification
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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.

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

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