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Basis of Presentation and New Accounting Standards - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 29, 2024	Dec. 29, 2024	Jun. 30, 2024
Accounting Policies [Abstract]
Investment tax credit receivable	$ 865.0	$ 865.0	$ 641.8
Increase (decrease) in receivables due to change in estimates	68.6
Depreciation	5.8
Net unrealized gain (loss) on available-for-sale securities	$ (5.7)	(5.7)	(11.6)
Debt securities, available-for-sale, unrealized gain (loss)		$ (2.4)	$ (2.4)

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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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-14

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Amount of 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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
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-Section 50
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-Section 50
-Paragraph 2
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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Increase (Decrease) In Investment Tax Credit Receivables Due To Change In Estimates

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Investment Tax Credit Receivable

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