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Fair Value Measurements (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Derivative asset | $ 496.9 | $ 695.3
Derivative liability | 473.4 | 649.6
Total, inventories liability |  | 22.9
Level 1 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Subtotal Assets | 97.2 | 173.7
Subtotal Liabilities | 168.0 | 306.4
Level 2 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Subtotal Assets | 401.7 | 519.6
Inventories liability | 3.1 | 22.9
Subtotal Liabilities | 308.1 | 364.8
Level 3 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Subtotal Assets | 0.5 | 4.2
Subtotal Liabilities | 0.4 | 1.3
Cash surrender value of life insurance | Level 2 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Investments | 2.5 | 2.2
Fair value measured on recurring basis |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Subtotal Assets | 499.4 | 697.5
Netting and collateral, asset | (360.7) | (380.0)
Total Assets | 138.7 | 317.5
Inventories liability | 3.1 | 22.9
Subtotal Liabilities | 476.5 | 672.5
Netting and collateral, liability | (439.4) | (607.6)
Total, inventories liability | 3.1 |
Total Liabilities | 37.1 | 64.9
Fair value measured on recurring basis | Level 3 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Debt | 773.8 | 689.9
Notes receivable | 8.5 | 7.0
Fair value measured on recurring basis | Cash surrender value of life insurance |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Investments | 2.5 | 2.2
Commodity contracts |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Total, derivative asset | 135.8 | 305.5
Total, derivative liability | 31.0 | 42.0
Commodity contracts | Level 1 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Derivative asset | 97.2 | 173.7
Derivative liability | 168.0 | 306.4
Commodity contracts | Level 2 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Derivative asset | 393.2 | 495.6
Derivative liability | 296.4 | 329.9
Commodity contracts | Level 3 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Derivative asset | 0.5 | 4.2
Derivative liability | 0.4 | 1.3
Commodity contracts | Fair value measured on recurring basis |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Derivative asset | 490.9 | 673.5
Netting and collateral, derivative asset | (355.1) | (368.0)
Total, derivative asset | 135.8 | 305.5
Derivative liability | 464.8 | 637.6
Netting and collateral, derivative liability | (433.8) | (595.6)
Total, derivative liability | 31.0 | 42.0
Foreign currency contracts |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Total, derivative asset | 0.4 | 9.8
Total, derivative liability | 3.0 |
Foreign currency contracts | Level 2 |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Derivative asset | 6.0 | 21.8
Derivative liability | 8.6 | 12.0
Foreign currency contracts | Fair value measured on recurring basis |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Derivative asset | 6.0 | 21.8
Netting and collateral, derivative asset | (5.6) | (12.0)
Total, derivative asset | 0.4 | 9.8
Derivative liability | 8.6 | 12.0
Netting and collateral, derivative liability | (5.6) | $ (12.0)
Total, derivative liability | $ 3.0 |

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