Revenue Recognition - Summary of Revenue by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 344.8	$ 265.4	$ 665.7	$ 525.5
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	155.1	133.0	297.7	270.3
Singapore [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	119.6	75.9	231.8	144.2
South Korea [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	21.3	17.7	41.6	36.1
Taiwan [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	15.0	10.7	30.2	19.6
Austria [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	13.0	10.3	27.5	24.5
China [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	12.0	12.4	21.1	20.4
Other [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 8.8	$ 5.4	$ 15.8	$ 10.4