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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 |

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