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Fair Value Measurements
6 Months Ended
Jun. 30, 2013
Fair Value Measurements

8. Fair Value Measurements

The following table summarizes assets and liabilities that are measured at fair value on a recurring basis as of June 30, 2013 and December 31, 2012:

 

                                                                             
     June 30, 2013     December 31, 2012  
     Fair Value Asset (Liability)     Fair Value Asset (Liability)  

(in millions)

   Level 1      Level 2     Total     Level 1      Level 2     Total  

Derivatives:

              

Assets

   $ —        $ 25.5      $ 25.5      $ —        $ 10.3      $ 10.3   

Liabilities

     —          (13.1     (13.1     —          (18.8     (18.8

Available-for-sale securities

     —          20.2        20.2        —          20.0        20.0   

Derivative assets and liabilities relate to interest rate swaps, foreign currency contracts and commodity contracts. Fair values are determined by the Company using market prices obtained from independent brokers or determined using valuation models that use as their basis readily observable market data that is actively quoted and can be validated through external sources, including independent pricing services, brokers and market transactions. Available-for-sale securities include inflation protected bonds and are valued based on quoted market prices.