Investments - Narrative (Details)	Jun. 25, 2023 USD ($) security	Jun. 26, 2022 USD ($) security	Jun. 27, 2021 USD ($)
Net Investment Income [Line Items]
Number of instruments in a loss position \| security	95	346
Fair value of instruments in loss position	$ 520,900,000	$ 650,800,000
Accrued interest receivable	10,100,000	5,900,000
Credit Loss Allowance	$ 0	$ 0	$ 0
Cash and Cash Equivalents
Net Investment Income [Line Items]
Number of instruments in a loss position \| security	2	6
Fair value of instruments in loss position	$ 18,500,000	$ 69,000,000
Unrealized loss	$ 100,000	$ 100,000

Amount excluding accrued interest, 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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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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