Net Sales and Long-Lived Assets by Geographic Location (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	$ 455.9				$ 424.6				$ 455.9	$ 424.6	$ 375.0
Net sales	626.8	581.6	595.4	552.2	558.9	536.2	549.1	509.6	2,356.0	2,153.8	1,939.3
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	262.1				238.6				262.1	238.6	219.1
Net sales									1,447.9	1,335.4	1,241.0
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	131.9				134.9				131.9	134.9	99.6
Net sales									691.8	581.0	461.2
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	3.6				4.7				3.6	4.7	20.4
Net sales									128.8	142.5	150.1
Other Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	58.3				46.4				58.3	46.4	35.9
Net sales									$ 87.5	$ 94.9	$ 87.0