Net Sales Based on Location of External Customer by Geographic Region (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Net sales		$ 989.8	$ 941.9	$ 2,908.3	$ 2,746.9
United States
Segment Reporting Information [Line Items]
Net sales		665.8	646.0	1,983.2	1,904.5
Europe
Segment Reporting Information [Line Items]
Net sales		114.6	108.6	332.5	328.6
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	[1]	149.0	131.9	420.1	357.1
Other
Segment Reporting Information [Line Items]
Net sales	[1]	$ 60.4	$ 55.4	$ 172.5	$ 156.7

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