Segment Data - Disclosure on Geographic Areas, Long-Lived Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Sales Information [Line Items]
Property, plant and equipment, net	$ 2,038.6	$ 2,037.9
US [Member]
Sales Information [Line Items]
Property, plant and equipment, net	1,151.6	1,181.3
Other Countries [Member]
Sales Information [Line Items]
Property, plant and equipment, net	$ 887.0	$ 856.6