Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 30, 2022	Jun. 16, 2022	Sep. 29, 2023	Dec. 30, 2022
Income Taxes [Line Items]
Income tax expense (benefit)	$ (10.8)	$ 34.6	$ 24.9	$ 497.3	$ (508.1)
Effective tax rate	0.60%	9.00%	8.00%	61.30%	23.00%
Current Income Tax Expense (Benefit)	$ 10.8	$ (23.8)	$ (20.5)	$ (23.9)	$ 32.6
Deferred Income Tax Expense (Benefit)	0.0	(10.8)	(4.4)	(473.4)	475.5
Unrecognized tax benefits	24.8				24.8
Increase (Decrease) Tax Expense (Benefit), Change in Operating Income	1.5				3.7
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0.1	0.4	0.4	0.9	0.1
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,714.1	383.6	$ 310.2	811.3	2,213.9
Proceeds from Income Tax Refunds					136.3
Interest accrued on unrecognized tax benefits	3.8				3.8	$ 2.8
Income Taxes Paid		$ 3.8		3.0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					475.5
Increase (Decrease), Income Tax Expense (Benefit), Prepaid Income Taxes	9.3				30.2
Increase (Decrease), Income Tax Expense (Benefit), CARES Act					1.3
Increase (Decrease) Tax Expense (Benefit), Cancellation of Debt Income				1,231.5
Increase (Decrease) Income Tax Expense (Benefit), Deferred Tax Assets, Reorganization Adjustments				141.3
Increase (Decrease) Income Tax Expense (Benefit), Valuation Allowance Reduction on Deferred Tax Assets				1,270.1
Increase (Decrease) Income Tax Expense (Benefit), Deferred Tax Liabilities Fresh Start Adjustments				297.1
Increase (Decrease), Tax Expense (Benefit), Uncertain Tax Positions				$ 285.3
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	$ 15.4				15.4
CARES Act [Member]
Income Taxes [Line Items]
Proceeds from Income Tax Refunds					141.6
Operational activity
Income Taxes [Line Items]
Proceeds from Income Tax Refunds					$ 5.3