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Goodwill - Schedule of Consolidated Income Statement Included Revenue and Earnings (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 1 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Chemsil and Chemtec [Member]
Business Acquisition [Line Items]          
Net sales $ 192.8 $ 183.4 $ 577.2 $ 562.7 $ 3.1
Net income $ 14.0 $ 15.5 $ 49.1 $ 55.6 $ 0.2