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Fair Value Measurements - Assets and Liabilities (Details) - USD ($) | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Debt | $ 1,067,800,000 | $ 1,186,300,000
Assets: |  |
Derivative assets | 243,200,000 | 347,200,000
Liabilities: |  |
Derivative liabilities | 212,800,000 | 332,500,000
Transfers from Level 1 to Level 2, assets | 0 | 0
Transfers from Level 2 to Level 1, assets | 0 | 0
Transfers from Level 1 to Level 2, liabilities | 0 | 0
Transfers from Level 2 to Level 1, liabilities | 0 | 0
Commodity contracts |  |
Assets: |  |
Derivative assets | 233,300,000 | 331,200,000
Liabilities: |  |
Derivative liabilities | 198,800,000 | 326,100,000
Foreign currency contracts |  |
Assets: |  |
Derivative assets | 9,900,000 | 16,000,000.0
Liabilities: |  |
Derivative liabilities | 14,000,000.0 | 6,400,000
Fair value measured on recurring basis |  |
Assets: |  |
Total assets at fair value | 248,300,000 | 351,200,000
Liabilities: |  |
Total liabilities at fair value | 212,800,000 | 332,500,000
Fair value measured on recurring basis | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 5,100,000 | 4,000,000.0
Fair value measured on recurring basis | Commodity contracts |  |
Assets: |  |
Derivative assets | 233,300,000 | 331,200,000
Liabilities: |  |
Derivative liabilities | 198,800,000 | 326,100,000
Fair value measured on recurring basis | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 9,900,000 | 16,000,000.0
Liabilities: |  |
Derivative liabilities | 14,000,000.0 | 6,400,000
Level 1 Inputs | Fair value measured on recurring basis |  |
Assets: |  |
Total assets at fair value | 168,000,000.0 | 273,600,000
Liabilities: |  |
Total liabilities at fair value | 163,000,000.0 | 236,600,000
Level 1 Inputs | Fair value measured on recurring basis | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 0 | 0
Level 1 Inputs | Fair value measured on recurring basis | Commodity contracts |  |
Assets: |  |
Derivative assets | 168,000,000.0 | 273,600,000
Liabilities: |  |
Derivative liabilities | 163,000,000.0 | 236,600,000
Level 1 Inputs | Fair value measured on recurring basis | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Level 2 Inputs | Fair value measured on recurring basis |  |
Assets: |  |
Total assets at fair value | 77,000,000.0 | 75,300,000
Liabilities: |  |
Total liabilities at fair value | 49,600,000 | 95,200,000
Level 2 Inputs | Fair value measured on recurring basis | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 5,100,000 | 4,000,000.0
Level 2 Inputs | Fair value measured on recurring basis | Commodity contracts |  |
Assets: |  |
Derivative assets | 62,000,000.0 | 55,300,000
Liabilities: |  |
Derivative liabilities | 35,700,000 | 88,800,000
Level 2 Inputs | Fair value measured on recurring basis | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 9,900,000 | 16,000,000.0
Liabilities: |  |
Derivative liabilities | 14,000,000.0 | 6,400,000
Level 3 Inputs | Fair value measured on recurring basis |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Debt | 1,100,000,000 | 1,200,000,000
Notes receivable | 29,900,000 | 16,900,000
Assets: |  |
Total assets at fair value | 3,300,000 | 2,300,000
Liabilities: |  |
Total liabilities at fair value | 100,000 | 700,000
Level 3 Inputs | Fair value measured on recurring basis | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 0 | 0
Level 3 Inputs | Fair value measured on recurring basis | Commodity contracts |  |
Assets: |  |
Derivative assets | 3,300,000 | 2,300,000
Liabilities: |  |
Derivative liabilities | 100,000 | 700,000
Level 3 Inputs | Fair value measured on recurring basis | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | $ 0 | $ 0

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