Income Taxes (Schedule of Reconciliation of Income Taxes at Statutory Rate and Tax Provision) (Details) - USD ($) $ in Millions		1 Months Ended	6 Months Ended		11 Months Ended	12 Months Ended
	Jun. 16, 2022	Dec. 29, 2023	Dec. 30, 2022	Jun. 16, 2022	Nov. 14, 2023	Dec. 27, 2024	Dec. 29, 2023	Dec. 30, 2022
Income Taxes [Line Items]
Income tax expense (benefit), intercompany financing and legal entity reorganization		$ (6.6)	$ (24.9)	$ (473.4)	$ (319.1)	$ 158.7
Provision (benefit) for income taxes at domestic statutory income tax rate (1)		(5.8)	(81.3)	(101.4)	(238.6)	76.8
Adjustments to reconcile to income tax provision:
Rate difference between non-U.S. and U.S. jurisdictions		2.2	4.7	(226.5)	(56.6)	(35.1)
Valuation allowances (4)		0.1	25.9	(600.8)	44.0	16.8
Permanently nondeductible and nontaxable items		(0.2)	3.1	(1.7)	3.2	12.6
Effective Income Tax Rate Reconciliation, Disposition of Business, Amount		0.0	4.7	0.0	0.0	0.0
Other		0.1	(1.4)	(4.0)	(1.3)	(3.4)
Income tax benefit, Legal Reorganization		0.0	0.0	0.0	(44.7)	0.0
Effective Income Tax Rate Reconciliation, Reorganization Items, net		0.0	1.7	15.7	6.7	0.0
Provision for (benefit from) income taxes		(8.0)	(52.0)	(497.3)	(277.8)	137.9
Increase (Decrease) Tax Expense (Benefit), Change in Operating Income		(1.4)	(30.2)	(12.8)	(35.0)	(28.3)
Increase (Decrease) Tax Expense (Benefit) due to reorganization items, net					48.9
Increase (Decrease) Tax Expense (Benefit), Non-restructuring Impairment Charges					11.6
Effective income tax rate reconciliation, pension plan settlement		0.0	0.0	(31.6)	(103.7)	$ 0.0
Increase (Decrease) Tax (Benefit), Inventory Step-Up Amortization		3.7	19.7
Increase (Decrease) Tax Expense (Benefit), Settlement liabilities accretion expense		0.2	$ 8.9
Increase (Decrease) Tax Expense (Benefit), Debt amortization expense		$ 0.3
Increase (Decrease) Tax Expense (Benefit) Liabilities Management & Separation Costs					15.7
Increase (Decrease) Tax Expense Benefit, Fresh-Start Accounting Revaluation of DTA	$ 1,202.0				242.8
Increase (Decrease) Income Tax Expense (Benefit), Release of UTP	285.3
Increase (Decrease) Tax Expense (Benefit), NOL carryforward reduction	1,209.8
Increase (Decrease) Tax Expense (Benefit), Permanently nondeductible impacts	191.9				139.1
Increase (Decrease) Tax Expense (Benefit), Prepaid income taxes	54.0
Alleviation of Substantial Doubt
Adjustments to reconcile to income tax provision:
Valuation allowances (4)				$ 512.1
Chapter 11 Emergence
Adjustments to reconcile to income tax provision:
Provision for (benefit from) income taxes	$ 31.6				$ 103.7
IRELAND
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			12.50%	12.50%			12.50%	12.50%