Net Sales Based On Location of External Customer and Identifiable Assets by Geographic Region (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Net sales	$ 762,600,000	$ 722,900,000	$ 742,600,000	$ 730,000,000	$ 751,900,000	$ 719,200,000	$ 725,000,000	$ 700,300,000	$ 2,958,100,000	$ 2,896,400,000	$ 2,720,200,000
Long-lived assets	457,900,000				457,500,000				457,900,000	457,500,000	416,100,000
United States
Segment Reporting Information [Line Items]
Net sales									1,967,700,000	1,956,000,000	1,889,000,000
Long-lived assets	390,500,000				390,800,000				390,500,000	390,800,000	362,000,000
Europe
Segment Reporting Information [Line Items]
Net sales									501,600,000	514,100,000	474,800,000
Long-lived assets	49,600,000				52,500,000				49,600,000	52,500,000	43,100,000
Japan
Segment Reporting Information [Line Items]
Net sales									163,200,000	142,800,000	131,900,000
Other
Segment Reporting Information [Line Items]
Net sales									325,600,000	283,500,000	224,500,000
Long-lived assets	$ 17,800,000				$ 14,200,000				$ 17,800,000	$ 14,200,000	$ 11,000,000