Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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(Schedule of Carrying Amount and Fair Value of Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 27, 2024	Dec. 29, 2023	Nov. 14, 2023	Jun. 16, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	$ 927.0	$ 1,731.2
Long-term Debt, Current Maturities	3.9	6.5
Long-term Debt, Gross	911.7	1,758.8
Debt, Long-term and Short-term, Combined Amount	915.6	1,765.3
Fourteen Point Seven Five Percent Second-Out Takeback Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate			14.75%
First-Out Takeback Term Loan Due November 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Current Maturities	0.0	1.7
Long-term Debt, Gross	0.0	241.7
Secured Debt	0.0	243.4
Second-Out Takeback Term Loan Due November 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Current Maturities	3.9	4.8
Long-term Debt, Gross	406.3	680.7
Secured Debt	410.2	685.5
Seven Point Five Percent
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross		836.4
Secured Debt	505.4
Senior Notes \| Five Point Five Percent Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate				5.50%
Senior Notes \| Five Point Six Two Five Percent Note
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate				5.625%
Senior Notes \| Ten Point Zero Percent Second Lien Notes (New 2L Notes)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate				10.00%
Fair Value, Inputs, Level 1 [Member] \| Seven Point Five Percent
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	511.6	844.4
Level 2 \| First-Out Takeback Term Loan Due November 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	0.0	232.8
Level 2 \| Second-Out Takeback Term Loan Due November 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	$ 415.4	$ 654.0