Net Sales Based on Location of External Customer and Identifiable Assets by Geographic Region (Detail) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales		$ 967.1	$ 941.9	$ 931.5	$ 873.5	$ 870.8	$ 865.7	$ 859.8	$ 819.7	$ 3,714.0	$ 3,416.0	$ 3,323.6
Long-lived assets		489.5				472.4				489.5	472.4
United States
Segment Reporting Information [Line Items]
Net sales										2,559.5	2,378.4	2,263.5
Long-lived assets		410.3				398.5				410.3	398.5
Europe
Segment Reporting Information [Line Items]
Net sales										446.4	439.5	488.5
Long-lived assets		48.7				49.5				48.7	49.5
Asia Pacific
Segment Reporting Information [Line Items]
Net sales	[1]									489.4	388.6	354.6
Long-lived assets	[2]	24.8				19.0				24.8	19.0
Other
Segment Reporting Information [Line Items]
Net sales	[1]									218.7	209.5	$ 217.0
Long-lived assets	[2]	$ 5.7				$ 5.4				$ 5.7	$ 5.4

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

[2] Beginning in 2016, amounts for Asia-Pacific are separately reported. Prior year amounts have been reclassified to conform to the current year presentation.