Financial Instruments, Short-term Investments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 26, 2021	Mar. 27, 2021	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 26, 2021	Jun. 27, 2020	Jun. 29, 2019
Debt Securities, Available-for-sale [Abstract]
Amortized Cost Basis	$ 0				$ 35,417				$ 0	$ 35,417
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0				137				0	137
Gross Unrealized Loss	0				(18)				0	(18)
Estimated Fair Value	0				35,536				0	35,536
Net income	253,739	$ 220,063	$ 183,945	$ 169,514	207,298	$ 161,190	$ 146,050	$ 140,156	827,261	654,694	$ 827,486
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized Cost Basis	0				35,417				0	35,417
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0				137				0	137
Gross Unrealized Loss	0				(18)				0	(18)
Estimated Fair Value	$ 0				$ 35,536				$ 0	$ 35,536