Defined Benefit Plans - Fair Value of Pension Assets by Major Category of Plan Assets (Detail) - USD ($) $ in Millions	Dec. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension assets	$ 468.0	$ 482.5
Group annuity/insurance contracts (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension assets	26.8	26.0	$ 25.5
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension assets	17.5	6.3
Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension assets	121.2	113.8
Fixed income
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension assets	267.2	291.6
Multi-strategy hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension assets	16.3	21.3
Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension assets	$ 19.0	$ 23.5