Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Jun. 26, 2021	Sep. 26, 2020	Jun. 27, 2020	Sep. 28, 2019	Jun. 26, 2021	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 253,739	$ 169,514	$ 207,298	$ 140,156	$ 827,261	$ 654,694	$ 827,486
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation					107,993	95,431	86,977
Depreciation and amortization					96,456	108,533	110,745
Deferred taxes					(5,331)	8,994	13,957
Research and Development Asset Acquired Other than Through Business Combination, Written-off					1,220	0	0
Loss (gain) from sale of property, plant and equipment					(260)	1,191	3,967
Gain (Loss) on Investments, Excluding Other than Temporary Impairments					1,745	11,353	(3)
Changes in assets and liabilities:
Accounts receivable					(254,229)	(42,335)	62,252
Inventories					21,896	(8,671)	36,003
Other current assets					(17,343)	(86,299)	(14,901)
Accounts payable					22,187	7,594	(10,272)
Price adjustment and other revenue reserves					110,673	48,426	(41,162)
Income taxes payable					(34,997)	(74,814)	(176,114)
All other accrued liabilities					41,154	76,758	(23,095)
Net Cash Provided by (Used in) Operating Activities					924,260	800,855	875,840
Cash flows from investing activities:
Purchases of property, plant and equipment					(64,942)	(67,049)	(82,823)
Proceeds from sale of property, plant, and equipment					94	392	340
Acquisitions					0	(69,270)	(2,949)
Proceeds from Divestiture of Businesses					281	378	0
Purchases of available-for-sale securities					0	0	(214,587)
Payments to Acquire Investments					(1,345)	(1,960)	(3,176)
Proceeds from Sale of Available-for-sale Securities					1,500	1,290	30,192
Proceeds from sales/maturities of available-for-sale securities					33,901	104,286	1,130,514
Payments for (Proceeds from) Other Investing Activities					0	(116)	(600)
Net cash used in investing activities					(30,511)	(32,049)	856,911
Cash flows from financing activities
Business acquisition,cash paid for contingent consideration					10,000	8,000	9,052
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability					5,835	0	0
Repayment of notes payable					0	0	(500,000)
Payments of Stock Issuance Costs					(61,880)	(35,877)	(29,689)
Proceeds from Stock Options Exercised					2,965	18,870	24,400
Proceeds from Stock Plans					18,498	42,260	40,175
Repurchase of common stock					(9,201)	(440,811)	(539,151)
Dividends paid					(128,147)	(517,162)	(505,576)
Net cash used in financing activities					(187,765)	(940,720)	(1,518,893)
Net increase (decrease) in cash, cash equivalents and restricted cash					705,984	(171,914)	213,858
Beginning of year		1,585,428		1,757,342	1,585,428	1,757,342	1,543,484
End of year	2,291,412		1,585,428		2,291,412	1,585,428	1,757,342	$ 1,543,484
Supplemental disclosures of cash flow information:
Cash (refunded) paid, net during the year for income taxes					140,808	98,211		98,104
Interest Paid, Excluding Capitalized Interest, Operating Activities					34,126	34,126	40,376
Noncash financing and investing activities:
Accounts payable related to property, plant and equipment purchases					27,126	11,586	12,090
Cash and cash equivalents:
Cash and cash equivalents		$ 1,578,670		$ 1,757,342	1,578,670	1,757,342
Restricted cash in other assets	13		6,758		13	6,758	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 2,291,412		$ 1,585,428		$ 2,291,412	$ 1,585,428	$ 1,757,342	$ 1,543,484