Fair Value Measurements of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 28, 2024	Dec. 30, 2023
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	$ 22.5	$ 28.9
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued expenses, Other Long-Term Liabilities	Accounts payable and accrued expenses, Other Long-Term Liabilities
Fair Value measurements on a recurring basis
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	$ 22.5	$ 28.9
Fair Value measurements on a recurring basis | Mutual funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	11.6	11.3
Fair Value measurements on a recurring basis | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	6.1	5.7
Fair Value measurements on a recurring basis | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	7.8	7.8
Fair Value measurements on a recurring basis | Interest rate swap derivative - liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	(1.5)	(3.5)
Fair Value measurements on a recurring basis | Put option liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	(5.9)	(5.7)
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	22.5	28.9
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Mutual funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	11.6	11.3
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Interest rate swap derivative - liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0.0	0.0
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Put option liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0.0	0.0
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	0.0	0.0
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Mutual funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	6.1	5.7
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	7.8	7.8
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Interest rate swap derivative - liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	(1.5)	(3.5)
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Put option liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0.0	0.0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	0.0	0.0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Mutual funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Interest rate swap derivative - liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0.0	0.0
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Put option liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	$ (5.9)	$ (5.7)