Financial Instruments, Short-term Investments (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Jun. 24, 2017
Available-for-sale Securities [Abstract]
Amortized Cost	$ 1,195,219	$ 499,952
Gross Unrealized Gain	38	0
Gross Unrealized Loss	(3,492)	(1,234)
Estimated Fair Value	1,191,765	498,718
Agency Securities
Available-for-sale Securities [Abstract]
Amortized Cost	6,994	0
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Estimated Fair Value	6,994	0
Certificates of deposit
Available-for-sale Securities [Abstract]
Amortized Cost	50,545	0
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Estimated Fair Value	50,545	0
Commercial paper
Available-for-sale Securities [Abstract]
Amortized Cost	82,249	0
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Estimated Fair Value	82,249	0
Corporate debt securities
Available-for-sale Securities [Abstract]
Amortized Cost	423,774	0
Gross Unrealized Gain	38	0
Gross Unrealized Loss	(1,153)	0
Estimated Fair Value	422,659	0
U.S. Treasury securities
Available-for-sale Securities [Abstract]
Amortized Cost	631,657	499,952
Gross Unrealized Gain	0	0
Gross Unrealized Loss	(2,339)	(1,234)
Estimated Fair Value	$ 629,318	$ 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
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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
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