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Goodwill and Other Intangible Assets - Gross carrying amount and accumulated amortization of the company's intangible assets other than goodwill (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Intangible asset balances by major asset class      
Finite-lived Intangible assets, amortization amount $ (45.1)   $ (43.3)
Intangible assets, gross (excluding goodwill) 166.4   162.6
Intangible assets, book value 121.3   119.3
Amortization expense 0.7 $ 0.8  
Trademarks and tradenames      
Intangible asset balances by major asset class      
Indefinite-lived intangible assets, book value 96.5   94.2
Distribution network      
Intangible asset balances by major asset class      
Indefinite-lived intangible assets, book value 18.8   18.4
Customer relationships      
Intangible asset balances by major asset class      
Finite-lived intangible assets, carrying amount 10.5   10.4
Finite-lived Intangible assets, amortization amount (7.4)   (7.1)
Finite-lived intangible assets, book value 3.1   3.3
Patents      
Intangible asset balances by major asset class      
Finite-lived intangible assets, carrying amount 29.8   29.1
Finite-lived Intangible assets, amortization amount (27.6)   (26.6)
Finite-lived intangible assets, book value 2.2   2.5
Engineering drawings      
Intangible asset balances by major asset class      
Finite-lived intangible assets, carrying amount 10.5   10.2
Finite-lived Intangible assets, amortization amount (9.8)   (9.3)
Finite-lived intangible assets, book value 0.7   0.9
Other intangibles      
Intangible asset balances by major asset class      
Finite-lived intangible assets, carrying amount 0.3   0.3
Finite-lived Intangible assets, amortization amount (0.3)   (0.3)
Finite-lived intangible assets, book value $ 0.0   $ 0.0