Geographic, Financial and Other Information - Schedule of Net Sales and Long-Lived Assets by Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 347.0	$ 337.2	$ 1,034.8	$ 1,021.6
Long-Lived Assets	482.0		482.0		406.3
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	192.0	184.7	580.6	565.8
Percentage of net sales by geographic location	55.00%	55.00%	56.00%	55.00%
Long-Lived Assets	433.1		433.1		357.8
Percentage Of Long Lived Assets By Geographic Location	90.00%		90.00%		88.00%
Outside Of The United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	155.0	152.5	454.2	455.8
Percentage of net sales by geographic location	45.00%	45.00%	44.00%	45.00%
Long-Lived Assets	$ 48.9		$ 48.9		$ 48.5
Percentage Of Long Lived Assets By Geographic Location	10.00%		10.00%		12.00%