Investments - Short-term Investments by Type (Details) - USD ($)	Mar. 27, 2022	Jun. 27, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 815,800,000	$ 770,500,000
Gross Unrealized Gains	200,000	5,500,000
Gross Unrealized Losses	(15,800,000)	(400,000)
Credit Loss Allowance	0	0
Estimated Fair Value	800,200,000	775,600,000
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	173,500,000	139,400,000
Gross Unrealized Gains	100,000	1,900,000
Gross Unrealized Losses	(3,100,000)	0
Credit Loss Allowance	0	0
Estimated Fair Value	170,500,000	141,300,000
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	478,000,000.0	456,500,000
Gross Unrealized Gains	100,000	3,300,000
Gross Unrealized Losses	(12,000,000.0)	(300,000)
Credit Loss Allowance	0	0
Estimated Fair Value	466,100,000	459,500,000
U.S. agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,000,000.0	15,800,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(100,000)	0
Credit Loss Allowance	0	0
Estimated Fair Value	3,900,000	15,800,000
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	99,000,000.0	72,300,000
Gross Unrealized Gains	0	300,000
Gross Unrealized Losses	(300,000)	(100,000)
Credit Loss Allowance	0	0
Estimated Fair Value	98,700,000	72,500,000
Non-U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,700,000
Gross Unrealized Gains	0
Gross Unrealized Losses	(300,000)
Credit Loss Allowance	0
Estimated Fair Value	7,400,000
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		16,500,000
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Credit Loss Allowance		0
Estimated Fair Value		16,500,000
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,000,000.0	50,000,000.0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Credit Loss Allowance	0	0
Estimated Fair Value	29,000,000.0	50,000,000.0
Variable rate demand notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,600,000	20,000,000.0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Credit Loss Allowance	0	0
Estimated Fair Value	$ 24,600,000	$ 20,000,000.0

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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