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Financial Instruments (Details 3) (USD $) In Millions, unless otherwise specified |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2012 BRAE | Dec. 31, 2011 BRAE | Apr. 30, 2010 BRAE | Dec. 31, 2012 Tekmar | Dec. 31, 2012 Contingent consideration
Reconciliation of changes in fair value of all financial assets and liabilities |  |  |  |  |
Balance at the beginning of the period | $ 0.2 | $ 1.1 |  |  | $ 1.1
Purchases, sales, settlements, net |  |  |  |  | 5.1
Total realized and unrealized gains (losses) included in Earnings |  |  |  |  | (1.0)
Balance at the ending of the period | 0.2 | 1.1 |  |  | 5.2
Contingent liability of the acquisition date fair value |  |  |  | 5.1 |
Contingent liability in case of failure to meet the performance metrics |  |  | 0 | 0 |
Contingent liability in case of complete achievement of performance metrics |  |  | 4.8 | 8.2 |
Decrease in fair value of contingent consideration obligations |  |  |  | $ 0.1 |

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