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Other Operating Expense - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2017
Transportation equipment | Natural gas |  |
Property, Plant and Equipment [Line Items] |  |
Loss on contract termination |  | $ 126
Transportation equipment | Oil |  |
Property, Plant and Equipment [Line Items] |  |
Loss on contract termination |  | $ 290
Wildhorse resource development corporation |  |
Property, Plant and Equipment [Line Items] |  |
Business acquisition transaction costs | $ 37 |
Severance costs | $ 38 |

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