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Goodwill and Other Intangible Assets, Net - Other Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]    
Indefinite-lived intangible assets, gross/net carrying amount $ 17.2 $ 17.2
Other intangible assets 119.3 122.1
Accumulated amortization (40.9) (34.3)
Finite-live intangible asset net of accumulated amortization 61.2  
Indefinite-lived intangible assets, gross/net carrying amount 17.2 17.2
Other intangible assets, net 78.4 87.8
Customer and distributor relationships [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross carrying amount 74.8 77.2
Accumulated amortization (28.1) (23.6)
Finite-live intangible asset net of accumulated amortization 46.7 53.6
Proprietary technology [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross carrying amount 19.5 19.6
Accumulated amortization (7.9) (6.7)
Finite-live intangible asset net of accumulated amortization 11.6 12.9
Trademarks [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross carrying amount 2.9 2.9
Accumulated amortization (1.9) (1.7)
Finite-live intangible asset net of accumulated amortization 1.0 1.2
Patents and other [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross carrying amount 4.9 5.2
Accumulated amortization (3.0) (2.3)
Finite-live intangible asset net of accumulated amortization $ 1.9 $ 2.9