Segment Information - Business Segment Information by Geographical Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 2,585.3	$ 2,405.4	$ 2,485.6
Plant, Property & Equipment, Net	521.7	464.5
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	853.6	900.3	941.1
Plant, Property & Equipment, Net	168.3	181.6
Italy
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	102.9	81.0
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	52.1	40.2
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	389.3	324.4	290.7
Plant, Property & Equipment, Net	39.1	38.5
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	34.5	28.7
Czech Republic
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	27.9	16.8
South Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	27.8	28.0
Other Developed Markets
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	495.5	459.6	476.8
Plant, Property & Equipment, Net	41.8	36.0
Emerging Growth Markets
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	846.9	721.1	$ 777.0
Plant, Property & Equipment, Net	$ 27.3	$ 13.7