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Pension Plans - Schedule of Target Allocation and Weighted-Average Asset Allocation by Asset Category and Fair Value of Plan Assets (Detail) - United States - USD ($) $ in Millions | Dec. 28, 2024 | Dec. 30, 2023
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation | 100.00% |
Actual weighted-average asset allocation | 100.00% | 100.00%
Defined Benefit Plan, Plan Assets, Allocation [Line Items] |  |
Fair value of plan assets | $ 1,126.3 | $ 1,143.7
Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation | 49.00% |
Actual weighted-average asset allocation | 46.00% | 46.00%
Debt securities and cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation | 46.00% |
Actual weighted-average asset allocation | 45.00% | 46.00%
Hedge funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Target allocation | 5.00% |
Actual weighted-average asset allocation | 9.00% | 8.00%

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