Net Sales Based on Location of External Customer by Geographic Region (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net sales		$ 938.8	$ 873.5
United States
Segment Reporting Information [Line Items]
Net sales		657.2	625.4
Europe
Segment Reporting Information [Line Items]
Net sales		103.2	104.3
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	[1]	126.3	97.9
Other
Segment Reporting Information [Line Items]
Net sales	[1]	$ 52.1	$ 45.9

[1] Beginning in the fourth quarter of 2016, net sales for Asia-Pacific are separately reported. Prior year amount have been reclassified to conform to current year presentation.