Financial Instruments, Short-term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 24, 2017
Available-for-sale Securities [Abstract]
Amortized Cost Basis	$ 1,086,585	$ 499,952
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	49	0
Gross Unrealized Loss	(3,719)	(1,234)
Estimated Fair Value	1,082,915	498,718
Certificates of Deposit [Member]
Available-for-sale Securities [Abstract]
Amortized Cost Basis	52,429
Gross Unrealized Loss	(1)
Estimated Fair Value	52,428
Commercial Paper [Member]
Available-for-sale Securities [Abstract]
Amortized Cost Basis	64,354
Estimated Fair Value	64,354
Corporate Debt Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost Basis	369,734
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	39
Gross Unrealized Loss	(2,008)
Estimated Fair Value	367,765
US Treasury Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost Basis	600,068	499,952
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	10	0
Gross Unrealized Loss	(1,710)	(1,234)
Estimated Fair Value	$ 598,368	$ 498,718

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

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

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

+ 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 (b)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
-Paragraph 2
-Subparagraph (c)
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This item represents the cost of debt and equity 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 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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