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DERIVATIVE INSTRUMENTS - BALANCE SHEET OFFSETTING (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Cash collateral |  |
Cash collateral in margin account | $ 19.3 | $ 16.4
Cash collateral received |  | 4.4
Offsetting Derivative Assets |  |
Gross amount recognized on the balance sheet | 14.5 | 41.6
Gross amount not offset on the balance sheet | (1.2) | (4.9)
Net amount | 13.3 | 36.7
Collateral received |  | 4.4
Offsetting Derivative Liabilities |  |
Gross amount recognized on the balance sheet | 4.2 | 2.4
Gross amount not offset on the balance sheet | (1.2) | (0.5)
Net amount | 3.0 | 1.9
Credit Risk Related Contingent Features |  |
Aggregate fair value of derivative instruments with credit risk-related contingent features that were in a liability position | $ 0.9 | $ 0.2

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