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Defined Benefit Plans - Fair Value of Pension Assets by Major Category of Plan Assets (Detail) - USD ($) $ in Millions | Dec. 28, 2024 | Dec. 31, 2023
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Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | $ 177.1 | $ 468.0
Fair value excluding investments measured at net asset value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | 26.4 | 26.8
Investments Measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | 150.7 | 441.2
Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | 2.6 | 17.5
Cash and cash equivalents | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | 2.6 |
Group annuity/insurance contracts |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  |  | 26.8
Group annuity/insurance contracts | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  |  | 26.8
Other investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value | [1] | 23.8 |
Other investments | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value | [1] | 23.8 |
Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | 27.3 | 121.2
Fixed income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | 95.1 | 267.2
Multi-strategy hedge funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | 12.1 | 16.3
Real estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan asstes at fair value |  | $ 16.2 | $ 19.0
[1] | (a) - Other investments consist of future contracts on U.S. Treasury notes and bonds primarily used to hedge interest rate exposures.

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