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Fair Value Measurements - Assets and Liabilities (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Derivative assets | $ 472,800,000 | $ 845,800,000
Liabilities: |  |
Derivative liabilities | 436,800,000 | 769,100,000
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 | 461,400,000 | 841,200,000
Liabilities: |  |
Derivative liabilities | 433,900,000 | 767,900,000
Foreign currency contracts |  |
Assets: |  |
Derivative assets | 11,400,000 | 4,600,000
Liabilities: |  |
Derivative liabilities | 2,900,000 | 1,200,000
Fair value measured on recurring basis |  |
Assets: |  |
Total assets at fair value | 481,600,000 | 852,100,000
Liabilities: |  |
Total liabilities at fair value | 436,800,000 | 769,100,000
Fair value measured on recurring basis | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 8,700,000 | 6,300,000
Fair value measured on recurring basis | Commodity contracts |  |
Assets: |  |
Derivative assets | 461,400,000 | 841,200,000
Liabilities: |  |
Derivative liabilities | 433,900,000 | 767,900,000
Fair value measured on recurring basis | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 11,400,000 | 4,600,000
Liabilities: |  |
Derivative liabilities | 2,900,000 | 1,200,000
Fair value measured on recurring basis | Level 1 Inputs |  |
Assets: |  |
Total assets at fair value | 346,000,000.0 | 585,600,000
Liabilities: |  |
Total liabilities at fair value | 352,300,000 | 556,500,000
Fair value measured on recurring basis | Level 1 Inputs | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 0 | 0
Fair value measured on recurring basis | Level 1 Inputs | Commodity contracts |  |
Assets: |  |
Derivative assets | 346,000,000.0 | 585,600,000
Liabilities: |  |
Derivative liabilities | 352,300,000 | 556,500,000
Fair value measured on recurring basis | Level 1 Inputs | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Fair value measured on recurring basis | Level 2 Inputs |  |
Assets and liabilities measured at estimated fair value on a recurring basis |  |
Debt | 700,000,000 | 700,000,000
Notes receivable | 20,500,000 | 28,200,000
Assets: |  |
Total assets at fair value | 119,200,000 | 265,600,000
Liabilities: |  |
Total liabilities at fair value | 74,000,000.0 | 212,400,000
Fair value measured on recurring basis | Level 2 Inputs | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 8,700,000 | 6,300,000
Fair value measured on recurring basis | Level 2 Inputs | Commodity contracts |  |
Assets: |  |
Derivative assets | 99,000,000.0 | 254,600,000
Liabilities: |  |
Derivative liabilities | 71,100,000 | 211,200,000
Fair value measured on recurring basis | Level 2 Inputs | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 11,400,000 | 4,600,000
Liabilities: |  |
Derivative liabilities | 2,900,000 | 1,200,000
Fair value measured on recurring basis | Level 3 Inputs |  |
Assets: |  |
Total assets at fair value | 16,400,000 | 900,000
Liabilities: |  |
Total liabilities at fair value | 10,500,000 | 200,000
Fair value measured on recurring basis | Level 3 Inputs | Cash surrender value of life insurance |  |
Assets: |  |
Cash surrender value of life insurance | 0 | 0
Fair value measured on recurring basis | Level 3 Inputs | Commodity contracts |  |
Assets: |  |
Derivative assets | 16,400,000 | 900,000
Liabilities: |  |
Derivative liabilities | 10,500,000 | 200,000
Fair value measured on recurring basis | Level 3 Inputs | Foreign currency contracts |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | $ 0 | $ 0

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