Retirement Plans - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)
Schedule Of Other Postretirement Benefits [Line Items]
Deferred compensation agreement, minimum	15 years
Deferred compensation agreement, maximum	18 years
Cash surrender value of life insurance	$ 60.7	$ 56.6
Defined contribution plan cost recognized	4.2	4.0	$ 4.6
Defined contribution plan at foreign subsidiary	1.0	1.1	$ 1.5
Deferred recognized compensation liability	1.1	1.1
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	42.6	45.3
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax	(28.6)	(30.4)
Accumulated benefit obligations for all defined benefit pension plans and the SERP	422.0	396.3
Actuarial loss included in accumulated other comprehensive income (loss)	$ 3.3
Amortization of Unrecognized net actuarial losses exceeding certain corridors period	5 years
Equity securities [Member]
Schedule Of Other Postretirement Benefits [Line Items]
Target investment allocation	58.00%
Fixed income securities [Member]
Schedule Of Other Postretirement Benefits [Line Items]
Target investment allocation	37.00%
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	3
Expected contributions to defined benefit plans	$ 1.7
SERP [Member]
Schedule Of Other Postretirement Benefits [Line Items]
Cash surrender value of life insurance	54.0	$ 50.1
Expected contributions to defined benefit plans	$ 3.7
Defined Contribution Plan [Member]
Schedule Of Other Postretirement Benefits [Line Items]
Number Of Retirement Plans	2