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Retirement Plans - Changes in Company's Assets and Related Obligations for its Pension Plans (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021
Change in projected benefit obligations: |  |  |
Projected benefit obligations at beginning of the year | $ 434.3 | $ 455.8 |
Service cost pertaining to benefits earned during the year | 5.3 | 6.9 | $ 6.4
Interest cost on projected benefit obligations | 13.2 | 12.8 | 14.2
Actuarial gains | (107.8) | (26.6) |
Benefits paid to plan participants | (16.8) | (14.6) |
Projected benefit obligations at end of the year | 328.2 | 434.3 | 455.8
Change in fair value of pension assets: |  |  |
Fair value of pension assets at beginning of the year | 323.0 | 305.0 |
Actual return (loss) on plan assets | (58.7) | 30.1 |
Benefits paid to plan participants | (16.7) | (14.6) |
Fair value of pension assets at end of the year | 251.4 | 323.0 | $ 305.0
Funded status | (76.8) | (111.3) |
Amounts recognized in the consolidated balance sheets: |  |  |
Current liabilities | (3.9) | (3.9) |
Accrued pension liabilities | (72.9) | (107.4) |
Net amount recognized | (76.8) | (111.3) |
Funded status of pension plans and SERP (supplemental): |  |  |
Funded status of qualified defined benefit plans and SERP | (76.8) | (111.3) |
Nonqualified trust assets | 46.6 | 45.6 |
Net funded status of pension plans and SERP (supplemental) | (38.0) | (73.3) |
SERP [Member] |  |  |
Change in fair value of pension assets: |  |  |
Company contributions | 3.8 | 2.5 |
Funded status of pension plans and SERP (supplemental): |  |  |
Nonqualified trust assets | $ 38.8 | $ 38.0 |

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