| **Acquisitions, Divestitures and Equity Method Investments - Narrative (Details) a in Thousands, $ in Millions**                  | 1 Months Ended | 3 Months Ended |        |
|-----------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|--------|
||
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        |           |           | $ 226  | $ 271 |   |
| Cash consideration                                                                                                                | $ 1,066        |           | 1,249  |   |   |
| Saddlehorn Pipeline Company, LLC                                                                                                  |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        |           |           | 160    |   |   |
| Saddlehorn Pipeline Company, LLC | Noble Midstream                                                                                |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        |           |           | 87     |   |   |
| EPIC Y-Grade, LP                                                                                                                  |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        |           |           | 14     |   |   |
| Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage                                                   |           |           |   | 15.00% |   |
| EPIC Y-Grade, LP | Noble Midstream                                                                                                |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Cash consideration                                                                                                                |           |           |   | $ 227 |   |
| EPIC Crude Holdings, LP                                                                                                           |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        |           |           | 33     |   |   |
| Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage                                                   |           |           |   | 30.00% |   |
| EPIC Propane                                                                                                                      |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        | $ 2            |           |   |   |   |
| Delaware Crossing JV                                                                                                              |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        |           |           | 17     |   |   |
| Delaware Crossing JV | Noble Midstream                                                                                            |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Contributions to equity method investments                                                                                        |           |           | $ 38   |   |   |
| Disposed by sale | Reeves County Assets                                                                                           |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Proved and unproved non-core acreage sold (in acres) | a                                                                          |           | 13             |   |   |   |
| Proceeds from divestitures                                                                                                        |           | $ 131          |   |   |   |
| Black Diamond Gathering                                                                                                           |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Equity method investment, ownership percent                                                                                       |           |           |   |   | 20.00% |
| Black Diamond Gathering | Black Diamond Gathering LLC                                                                             |           |           |   |   |   |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |           |           |   |   |   |
| Ownership percent                                                                                                                 |           |           | 54.40% |   |   |

| X                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Oil And Gas Producing Properties, Area Of Proved And Unproved Acreage, Divested
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| X                                                                                                                                                                                                                                                                                                                                                                                      |
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| - Definition
Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.
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No definition available.
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| - Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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No definition available.
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| - Definition
The parent entity's interest in net assets of the subsidiary, expressed as a percentage.
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No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.
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| - Definition
The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.
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| X                                                                                                                                    |
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| X                                                                                                                                                                                     |
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| X                                                                                                                                           |
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| X                                                                                                                                            |
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