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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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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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