Debt (Details) - USD ($) $ in Millions		Mar. 28, 2025	Dec. 27, 2024	Nov. 14, 2023
Long-term debt
Total Debt Issuance Costs		$ 2.0	$ 2.2
Total Debt		911.3	915.6
Debt Instrument, Face Amount		864.6	865.6
Debt Issuance Costs		2.0	2.2
Long-term Debt		907.4	911.7
Debt Instrument, Face Amount, Noncurrent Maturity		860.7	861.7
Second-Out Takeback Term Loan Due November 2028
Long-term debt
Debt Instrument, Face Amount				$ 642.0
Debt Issuance Costs		0.0	0.0
Debt Instrument, Face Amount, Current Maturity		3.9	3.9
Long-term Debt, Current Maturities		3.9	3.9
Debt Issuance Costs, Current, Net		0.0	0.0
Long-term Debt		403.9	406.3
Debt Instrument, Face Amount, Noncurrent Maturity		$ 383.5	384.5
Long-term Debt, Weighted Average Interest Rate, at Point in Time	[1]	13.51%
First-Out Takeback Term Loan Due November 2028
Long-term debt
Debt Instrument, Face Amount				229.4
Fourteen Point Seven Five Percent Second-Out Takeback Notes
Long-term debt
Debt Instrument, Face Amount				$ 778.6
Debt Issuance Costs		$ 0.0	0.0
Long-term Debt		503.5	505.4
Debt Instrument, Interest Rate, Stated Percentage				14.75%
Debt Instrument, Face Amount, Noncurrent Maturity		477.2	477.2
Receivables Financing Facility
Long-term debt
Debt Issuance Costs		2.0	2.2
Long-term Debt		0.0	0.0
Debt Instrument, Face Amount, Noncurrent Maturity		$ 0.0	$ 0.0
Takeback Term Loans
Long-term debt
Debt Instrument, Face Amount				$ 871.4
Fixed-rate instruments
Long-term debt
Long-term Debt, Weighted Average Interest Rate, at Point in Time		14.75%

[1] Includes the impact of the interest rate cap agreement, which is discussed further in Note 14.