Fair Value Measurements of Financial Instruments (Details) - USD ($) $ in Millions	Jun. 29, 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)	$ 28.2	$ 28.9
Fair Value, Recurring
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents (including money market funds)	28.2	28.9
Fair Value, Recurring | 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)	28.2	28.9
Fair Value, Recurring | 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, Recurring | 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, Recurring | Mutual Funds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	10.9	11.3
Fair Value, Recurring | Mutual Funds | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	10.9	11.3
Fair Value, Recurring | Mutual Funds | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value, Recurring | Mutual Funds | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value, Recurring | Government Securities
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	5.5	5.7
Fair Value, Recurring | Government Securities | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value, Recurring | Government Securities | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	5.5	5.7
Fair Value, Recurring | Government Securities | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value, Recurring | Corporate Bonds
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	7.9	7.8
Fair Value, Recurring | Corporate Bonds | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value, Recurring | Corporate Bonds | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	7.9	7.8
Fair Value, Recurring | Corporate Bonds | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	0.0	0.0
Fair Value, Recurring | Interest rate swap
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - asset	0.2
Derivative financial instruments - liability	(1.5)	(3.5)
Fair Value, Recurring | Interest rate swap | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - asset	0.0
Derivative financial instruments - liability	0.0	0.0
Fair Value, Recurring | Interest rate swap | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - asset	0.2
Derivative financial instruments - liability	(1.5)	(3.5)
Fair Value, Recurring | Interest rate swap | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - asset	0.0
Derivative financial instruments - liability	0.0	0.0
Fair Value, Recurring | Put Option Liability
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	(5.7)	(5.7)
Fair Value, Recurring | Put Option Liability | Quoted prices in active markets for identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0.0	0.0
Fair Value, Recurring | Put Option Liability | Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	0.0	0.0
Fair Value, Recurring | Put Option Liability | Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments - liability	$ (5.7)	$ (5.7)