Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jul. 31, 2025	Sep. 26, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024	Dec. 27, 2024
Income Taxes [Line Items]
Income tax benefit		$ 35.9	$ (7.2)	$ 21.3	$ (20.4)
Losses from continuing operations		$ 327.0	$ 19.0	$ 338.0	$ 114.8
Effective tax rate		11.00%	(37.90%)	6.30%	(17.80%)
Income taxes paid				$ 10.3	$ 4.4
Unrecognized tax benefits		$ 34.2		34.2		$ 31.1
Decrease in Unrecognized Tax Benefits is Reasonably Possible		5.0		5.0
Possible decrease in related interest and penalties from statute of limitations		$ 4.1		$ 4.1
Increase in deferred tax asset	$ 144.4
Increase in deferred tax liability	139.4
Net deferred tax asset increase	5.0
Deferred tax assets, tax loss and credit carryforwards	30.0
Deferred tax assets, property, plant and equipment	26.0
Deferred tax assets, goodwill	20.8
Deferred tax assets, accrued expenses	65.1
Deferred tax assets, debt adjustments	19.8
Deferred tax assets, interest carryforwards	16.6
Deferred tax liabilities, inventory	100.3
Valuation allowance	73.0
Increase in prepaid expenses and other current assets	21.3
Increase in accrued and other current liabilities	8.0
Increase in other income tax liabilities	$ 4.4
IRELAND
Income Taxes [Line Items]
Effective income tax rate			12.50%