Long-Lived Assets by Geographic Region (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	$ 955.8	$ 993.9	$ 1,018.8
U.S.
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	642.0	720.1	732.3
Asia
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	127.6	102.6	111.5
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	81.0	65.3	68.0
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Consolidated long-lived assets	$ 105.2	$ 105.9	$ 107.0