Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Schedule of Net Revenues and Long-Lived Assets by Geographic Regions (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 660.2	$ 589.8	$ 544.3	$ 535.7	$ 499.7	$ 462.5	$ 474.1	$ 463.6	$ 2,330.0	$ 1,899.8	$ 2,075.1
Long-lived assets	503.9				339.3				503.9	339.3
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									1,058.9	888.4	1,022.7
Long-lived assets	364.0				208.3				364.0	208.3
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									273.5	178.6	127.7
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									278.8	167.7	203.6
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									519.6	435.8	477.1
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues									199.2	229.3	$ 244.0
Long-lived assets	45.1				41.4				45.1	41.4
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 94.8				$ 89.6				$ 94.8	$ 89.6