Income Taxes - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Income Tax [Line Items]
Effective income tax rate		23.80%	24.60%
Tax Cuts And Jobs Act Of 2017, incomplete accounting, increase (decrease) in provisional income tax expense	$ 1.8		$ 3.9
Tax Cuts And Jobs Act Of 2017, incomplete accounting, increase in provisional income tax rate, basis points	0.50%		0.50%
Minimum
Income Tax [Line Items]
Decrease in unrecognized tax benefits		$ 0.0
Increase in unrecognized tax benefits		0.0
Maximum
Income Tax [Line Items]
Decrease in unrecognized tax benefits		2.5
Increase in unrecognized tax benefits		$ 0.9