Segment Information - Business Segment Information by Geographical Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 2,654.6	$ 2,496.9	$ 2,227.8
Plant, Property & Equipment, Net	443.9	426.2
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	927.0	896.2	869.3
Plant, Property & Equipment, Net	169.4	151.0
Italy
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	89.3	78.7
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	303.3	266.7	200.5
Plant, Property & Equipment, Net	44.9	51.8
South Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	37.1	40.5
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Plant, Property & Equipment, Net	36.1	31.3
Other Developed Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	588.3	583.4	519.3
Plant, Property & Equipment, Net	20.9	22.0
Emerging Growth Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	836.0	750.6	638.7
Plant, Property & Equipment, Net	$ 46.2	$ 50.9