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Retirement Plans - Summary of Net Pension and SERP Expense Recognized (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 30, 2023 | Dec. 31, 2022 | Jan. 01, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost pertaining to benefits earned during the year | $ 3.1 | $ 5.3 | $ 6.9
Interest cost on projected benefit obligations | 17.8 | 13.2 | 12.8
Expected return on pension assets | (18.5) | (20.5) | (19.5)
Net amortization loss (gain) | (0.7) | 11.3 | 13.8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment | 1.0 | 0.0 | 0.0
Net pension expense | 0.7 | 9.3 | 14.0
Pension [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net pension expense | (3.2) | 5.5 | 8.3
SERP [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Net pension expense | $ 3.9 | $ 3.8 | $ 5.7

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-6 + Details
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