Fresh Start Accounting - Fresh Start Changes in Other Long-term Liabilities (Details) - USD ($) $ in Millions	Jun. 28, 2026	Sep. 29, 2025	Jun. 29, 2025
Reorganization, Chapter 11 [Line Items]
Operating lease liabilities	$ 99.2		$ 139.5
Long-term liabilities held for sale from discontinued operations	47.0		44.5
Change in deferred tax liability as a result of fresh start accounting	1.9		0.5
Net change in other long-term liabilities	$ 153.7	$ 184.7	$ 203.1
Fresh-Start Adjustments
Reorganization, Chapter 11 [Line Items]
Operating lease liabilities		(46.4)
Long-term liabilities held for sale from discontinued operations		14.4
Change in deferred tax liability as a result of fresh start accounting		(1.4)
Net change in other long-term liabilities		$ (33.4)

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

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