Income Taxes (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jun. 30, 2023	Jun. 16, 2022	Jun. 30, 2023	Jun. 16, 2022	Dec. 30, 2022
Income Taxes [Line Items]
Income tax expense (benefit)	$ 9.7	$ (528.1)	$ 491.4	$ (497.3)	$ 497.3
Effective tax rate	13.20%	240.40%	71.70%	99.50%	61.30%
Current Income Tax Expense (Benefit)	$ (3.3)	$ 19.2	$ (18.9)	$ 21.8	$ (23.9)
Deferred Income Tax Expense (Benefit)	(6.4)	508.9	(472.5)	475.5	(473.4)
Unrecognized tax benefits		24.8		24.8
Increase (Decrease) Tax Expense (Benefit), Change in Operating Income	8.0	1.8		2.2
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0.0	0.0	0.3	0.0	0.9
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	73.4	219.7	$ 685.2	499.8	811.3
Proceeds from Income Tax Refunds				137.8
Interest accrued on unrecognized tax benefits		3.4		3.4		$ 2.8
Income Taxes Paid	0.7				3.0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				475.5
Increase (Decrease), Income Tax Expense (Benefit), Valuation Allowances, Current Year Deferred Tax Assets		29.9
Increase (Decrease), Income Tax Expense (Benefit), Prepaid Income Taxes		20.9		20.9
Increase (Decrease), Income Tax Expense (Benefit), CARES Act				1.3
Increase (Decrease) Tax Expense (Benefit), Separation Costs, Reorganization Items, Net and Restructuring Charges	$ 1.7
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				$ 3.8