Segment and Geographic Area Information - Long-Lived Assets by Geographic Region (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	$ 894.9	$ 1,005.9	$ 866.5
U.S.
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	608.1	733.6	614.0
Asia
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	160.8	138.9	113.8
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	63.3	57.4	75.5
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	$ 62.7	$ 76.0	$ 63.2