FINANCIAL INSTRUMENTS - Cash, Cash Equivalents, Investments, Restricted Cash and Investments and Other Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 29, 2019	Jun. 30, 2019		Sep. 23, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	$ 5,372,050
Total cost	5,916,595	$ 5,760,736
Total, unrealized gain	5,478	3,836
Total unrealized (loss)	(385)	(451)
Total fair value	5,921,688	5,764,121
Cash and Cash Equivalents	4,607,182	3,658,219	[1]	$ 2,568,085
Investments	983,650	1,772,984	[1]
Restricted cash and investments	254,654	255,177	[1]
Other Assets	76,202	77,741
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total cost	2,840,863	2,187,275
Total, unrealized gain	3,797	1,346
Total unrealized (loss)	(309)	(307)
Total fair value	2,844,351	2,188,314
Cash and Cash Equivalents	2,630,561	1,731,640
Investments	137,588	378,933
Restricted cash and investments	0	0
Other Assets	76,202	77,741
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total cost	1,003,706	1,542,315
Total, unrealized gain	1,681	2,490
Total unrealized (loss)	(76)	(144)
Total fair value	1,005,311	1,544,661
Cash and Cash Equivalents	159,249	150,610
Investments	846,062	1,394,051
Restricted cash and investments	0	0
Other Assets	0	0
Cash
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	471,656	467,460
Cash and Cash Equivalents	467,030	462,310
Investments	0	0
Restricted cash and investments	4,626	5,150
Other Assets	0	0
Time deposit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	1,600,370	1,563,686
Cash and Cash Equivalents	1,350,342	1,313,659
Investments	0	0
Restricted cash and investments	250,028	250,027
Other Assets	0	0
Money market funds | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	1,948,349	1,644,659
Debt securities, unrealized gain	0	0
Debt securities, unrealized (loss)	0	0
Debt securities, fair value	1,948,349	1,644,659
Cash and Cash Equivalents	1,948,349	1,644,659
Investments	0	0
Restricted cash and investments	0	0
Other Assets	0	0
U.S. Treasury and agencies | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	819,625	465,655
Debt securities, unrealized gain	195	283
Debt securities, unrealized (loss)	(20)	(24)
Debt securities, fair value	819,800	465,914
Cash and Cash Equivalents	682,212	86,981
Investments	137,588	378,933
Restricted cash and investments	0	0
Other Assets	0	0
Mutual funds | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities, cost	72,889	76,961
Trading securities, unrealized gain	3,602	1,063
Trading securities, unrealized (loss)	(289)	(283)
Trading securities, fair value	76,202	77,741
Cash and Cash Equivalents	0	0
Investments	0	0
Restricted cash and investments	0	0
Other Assets	76,202	77,741
Government-sponsored enterprises | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	53,526	16,005
Debt securities, unrealized gain	2	5
Debt securities, unrealized (loss)	(23)	(41)
Debt securities, fair value	53,505	15,969
Cash and Cash Equivalents	37,496	0
Investments	16,009	15,969
Restricted cash and investments	0	0
Other Assets	0	0
Foreign government bonds | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	52,866	24,408
Debt securities, unrealized gain	18	35
Debt securities, unrealized (loss)	(2)	0
Debt securities, fair value	52,882	24,443
Cash and Cash Equivalents	26,554	0
Investments	26,328	24,443
Restricted cash and investments	0	0
Other Assets	0	0
Corporate notes and bonds | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	865,133	1,466,167
Debt securities, unrealized gain	1,533	2,310
Debt securities, unrealized (loss)	(45)	(99)
Debt securities, fair value	866,621	1,468,378
Cash and Cash Equivalents	95,199	150,610
Investments	771,422	1,317,768
Restricted cash and investments	0	0
Other Assets	0	0
Mortgage backed securities — residential | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	5,039	6,148
Debt securities, unrealized gain	13	0
Debt securities, unrealized (loss)	0	(4)
Debt securities, fair value	5,052	6,144
Cash and Cash Equivalents	0	0
Investments	5,052	6,144
Restricted cash and investments	0	0
Other Assets	0	0
Mortgage backed securities — commercial | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, cost	27,142	29,587
Debt securities, unrealized gain	115	140
Debt securities, unrealized (loss)	(6)	0
Debt securities, fair value	27,251	29,727
Cash and Cash Equivalents	0	0
Investments	27,251	29,727
Restricted cash and investments	0	0
Other Assets	$ 0	$ 0

[1] Derived from audited financial statements