Investments - Narrative (Details)	Sep. 25, 2022 USD ($) security	Jun. 26, 2022 USD ($) security
Net Investment Income [Line Items]
Number of instruments in loss position \| security	305	346
Fair value of instruments in loss position	$ 578,100,000	$ 650,800,000
Unrealized loss	27,600,000	22,600,000
Accrued interest receivable	4,500,000	5,900,000
Credit Loss Allowance	$ 0	$ 0
Cash and Cash Equivalents
Net Investment Income [Line Items]
Number of instruments in loss position \| security	9	6
Fair value of instruments in loss position	$ 97,800,000	$ 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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