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Discontinued Operations (Carrying Amounts of Assets and Liabilities Classified as Associated with Discontinued Operations on Consolidated Balance Sheets) (Details) $ in Millions | Dec. 31, 2019 USD ($)
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Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Accounts receivable | $ 39
Other current assets | 7
Oil and gas property and equipment, based on successful efforts accounting, net | 751
Other property and equipment, net | 11
Goodwill | 88
Other long-term assets | 81
Total assets associated with discontinued operations | 977
Accounts payable | 19
Revenues and royalties payable | 47
Other current liabilities | 252
Asset retirement obligations | 141
Other long-term liabilities | 185
Total liabilities associated with discontinued operations | 644
Barnett Shale [Member] |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Accounts receivable | 38
Other current assets | 5
Oil and gas property and equipment, based on successful efforts accounting, net | 751
Other property and equipment, net | 11
Goodwill | 88
Total assets associated with discontinued operations | 893
Accounts payable | 15
Revenues and royalties payable | 44
Other current liabilities | 19
Asset retirement obligations | 141
Other long-term liabilities | 16
Total liabilities associated with discontinued operations | 235
Canada [Member] |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Accounts receivable | 1
Other current assets | 2
Other long-term assets | 81
Total assets associated with discontinued operations | 84
Accounts payable | 4
Revenues and royalties payable | 3
Other current liabilities | 233
Other long-term liabilities | 169
Total liabilities associated with discontinued operations | $ 409

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