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Investments - Short-term Investments by Type (Details) - USD ($)
Sep. 24, 2023
Jun. 25, 2023
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 1,606,400,000 $ 1,220,600,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses (20,800,000) (22,700,000)
Credit Loss Allowance 0 0
Estimated Fair Value 1,585,600,000 1,197,900,000
U.S. treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 691,600,000 261,800,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses (1,300,000) (1,400,000)
Credit Loss Allowance 0 0
Estimated Fair Value 690,300,000 260,400,000
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 483,800,000 512,300,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses (15,000,000.0) (16,700,000)
Credit Loss Allowance 0 0
Estimated Fair Value 468,800,000 495,600,000
Municipal bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 146,000,000.0 179,700,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses (4,300,000) (4,400,000)
Credit Loss Allowance 0 0
Estimated Fair Value 141,700,000 175,300,000
Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 127,900,000 50,200,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Credit Loss Allowance 0 0
Estimated Fair Value 127,900,000 50,200,000
U.S. agency securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 72,800,000 77,000,000.0
Gross Unrealized Gains 0 0
Gross Unrealized Losses (200,000) (200,000)
Credit Loss Allowance 0 0
Estimated Fair Value 72,600,000 76,800,000
Certificates of deposit    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 57,100,000 112,300,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Credit Loss Allowance 0 0
Estimated Fair Value 57,100,000 112,300,000
Variable rate demand notes    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 27,200,000 27,300,000
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Credit Loss Allowance 0 0
Estimated Fair Value $ 27,200,000 $ 27,300,000