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Basis of Presentation and New Accounting Standards - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 29, 2024	Sep. 24, 2023	Jun. 30, 2024
Accounting Policies [Abstract]
Investment tax credit receivable	$ 723.5		$ 641.8
Net unrealized gain (loss) on available-for-sale securities	(4.3)		(11.6)
Debt securities, available-for-sale, unrealized gain (loss)	(2.4)		$ (2.4)
Accrued property and equipment	$ 385.9	$ 340.2

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Amount, after tax, of accumulated unrealized gain (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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Future cash outflow to pay for construction in progress expenditures that have occurred.

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