Financial Instruments - Cash, Cash Equivalents, Short-Term Investments, Restricted Cash and Investments and Other Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Jun. 30, 2019	Jun. 24, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	$ 5,980,645
Total Cost	7,027,291	$ 5,760,736
Total, Unrealized Gain	10,543	3,836
Total, Unrealized (Loss)	(1,244)	(451)
Total, Fair Value	7,036,590	5,764,121
Cash and Cash Equivalents	4,915,172	3,658,219	$ 4,512,257
Investments	1,795,080	1,772,984
Restricted Cash & Investments	253,911	255,177
Other Assets	72,427	77,741
Cash
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	977,862	467,460
Cash and Cash Equivalents	973,978	462,310
Investments	0	0
Restricted Cash & Investments	3,884	5,150
Other Assets	0	0
Time deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	2,244,655	1,563,686
Cash and Cash Equivalents	1,994,628	1,313,659
Investments	0	0
Restricted Cash & Investments	250,027	250,027
Other Assets	0	0
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Cost	2,330,222	2,187,275
Total, Unrealized Gain	4,944	1,346
Total, Unrealized (Loss)	(937)	(307)
Total, Fair Value	2,334,229	2,188,314
Cash and Cash Equivalents	1,786,342	1,731,640
Investments	475,460	378,933
Restricted Cash & Investments	0	0
Other Assets	72,427	77,741
Level 1 | Money market funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	1,709,350	1,644,659
Debt securities, Unrealized Gain	0	0
Debt securities, Unrealized (Loss)	0	0
Debt securities, Fair Value	1,709,350	1,644,659
Cash and Cash Equivalents	1,709,350	1,644,659
Investments	0	0
Restricted Cash & Investments	0	0
Other Assets	0	0
Level 1 | U.S. Treasury and agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	552,088	465,655
Debt securities, Unrealized Gain	373	283
Debt securities, Unrealized (Loss)	(9)	(24)
Debt securities, Fair Value	552,452	465,914
Cash and Cash Equivalents	76,992	86,981
Investments	475,460	378,933
Restricted Cash & Investments	0	0
Other Assets	0	0
Level 1 | Mutual funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities, Cost	68,784	76,961
Trading securities, Unrealized Gain	4,571	1,063
Trading securities, Unrealized (Loss)	(928)	(283)
Trading securities, Fair Value	72,427	77,741
Cash and Cash Equivalents	0	0
Investments	0	0
Restricted Cash & Investments	0	0
Other Assets	72,427	77,741
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total Cost	1,474,552	1,542,315
Total, Unrealized Gain	5,599	2,490
Total, Unrealized (Loss)	(307)	(144)
Total, Fair Value	1,479,844	1,544,661
Cash and Cash Equivalents	160,224	150,610
Investments	1,319,620	1,394,051
Restricted Cash & Investments	0	0
Other Assets	0	0
Level 2 | Government-sponsored enterprises
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	31,442	16,005
Debt securities, Unrealized Gain	12	5
Debt securities, Unrealized (Loss)	0	(41)
Debt securities, Fair Value	31,454	15,969
Cash and Cash Equivalents	25,999	0
Investments	5,455	15,969
Restricted Cash & Investments	0	0
Other Assets	0	0
Level 2 | Foreign government bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	10,693	24,408
Debt securities, Unrealized Gain	28	35
Debt securities, Unrealized (Loss)	(5)	0
Debt securities, Fair Value	10,716	24,443
Cash and Cash Equivalents	2,540	0
Investments	8,176	24,443
Restricted Cash & Investments	0	0
Other Assets	0	0
Level 2 | Corporate notes and bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	1,405,615	1,466,167
Debt securities, Unrealized Gain	5,344	2,310
Debt securities, Unrealized (Loss)	(302)	(99)
Debt securities, Fair Value	1,410,657	1,468,378
Cash and Cash Equivalents	131,685	150,610
Investments	1,278,972	1,317,768
Restricted Cash & Investments	0	0
Other Assets	0	0
Level 2 | Mortgage backed securities - residential
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	3,142	6,148
Debt securities, Unrealized Gain	71	0
Debt securities, Unrealized (Loss)	0	(4)
Debt securities, Fair Value	3,213	6,144
Cash and Cash Equivalents	0	0
Investments	3,213	6,144
Restricted Cash & Investments	0	0
Other Assets	0	0
Level 2 | Mortgage backed securities - commercial
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, Cost	23,660	29,587
Debt securities, Unrealized Gain	144	140
Debt securities, Unrealized (Loss)	0	0
Debt securities, Fair Value	23,804	29,727
Cash and Cash Equivalents	0	0
Investments	23,804	29,727
Restricted Cash & Investments	0	0
Other Assets	$ 0	$ 0