Government Subsidies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 26, 2020	Jun. 26, 2020	Jun. 28, 2019
Government Grants And Subsidies [Abstract]
Government subsidies to employees	$ 2.7
Offset to cost of revenues	0.7
Other income (expense), net	0.6	$ (2.1)	$ 1.1
Offset to cost of goods sold and other operating expenses	$ 0.7