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Retirement Plans - Additional Information (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 28, 2019 USD ($) | Dec. 29, 2018 USD ($) | Dec. 30, 2017 USD ($)
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement | $ 0.0 | $ 66.6 |
Cash surrender value of life insurance | 66.8 | 64.4 |
Defined contribution plan cost recognized | 5.2 | 4.5 | $ 4.2
Defined contribution plan at foreign subsidiary | 1.1 | 1.1 | 1.0
Deferred recognized compensation liability | 0.9 | 1.1 |
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax | 61.4 | 44.6 |
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax | (48.7) | (36.2) |
Accumulated benefit obligations for all defined benefit pension plans and the SERP | 378.4 | 319.1 |
Actuarial loss included in accumulated other comprehensive income (loss) | $ 6.6 |  |
Amortization of Unrecognized net actuarial losses exceeding certain corridors period | 5 years |  |
Settlement loss | $ 0.0 | 7.2 | $ 0.0
Equity securities [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Target investment allocation | 57.00% |  |
Fixed income securities [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Target investment allocation | 38.00% |  |
Real Estate Investment [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Target investment allocation | 5.00% |  |
Pension [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Number Of Retirement Plans | 2 |  |
Expected contributions to defined benefit plans |  | 0.0 |
Defined Contribution Plan [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Number Of Retirement Plans | 2 |  |
SERP [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Cash surrender value of life insurance | $ 59.6 | $ 57.4 |
Expected contributions to defined benefit plans | $ 3.7 |  |

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