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Property, Plant and Equipment - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Property, Plant and Equipment [Line Items] |  |  |
Impairment charge | $ 4,823,678,000 | $ 629,000 |
Proved Oil And Gas Properties |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimate of future asset retirement costs | 42,100,000 |  | $ 42,300,000
Impairment loss | 4,400,000,000 | 0 |
Proved Oil And Gas Properties | Williston Basin |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment loss | 3,800,000,000 |  |
Proved Oil And Gas Properties | Delaware Basin |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment loss | 637,300,000 |  |
Other Property, Plant and Equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimate of future asset retirement costs | 1,400,000 |  | $ 1,400,000
Unproved Oil And Gas Properties |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment charge | 291,300,000 | 600,000 |
Midstream Assets |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment charge | $ 108,300,000 | $ 0 |

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- Definition The amount of asset retirement costs previously incurred and capitalized separately from the capitalized amount of the associated long-lived assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 + Details
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- Definition Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 + Details
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- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 35 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66906256&loc=d3e66150-109466 + Details
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