| **Basis of Presentation - Narrative (Details) - USD ($) $ in Millions** |        |        | 1 Months Ended | 3 Months Ended |        |
|-------------------------------------------------------------------------|--------|--------|----------------|----------------|--------|
||
| **Finite-Lived Intangible Assets [Line Items]**                         |   |   |           |           |   |   |
| Goodwill                                                                |   |   | $ 110          | $ 110          |   | $ 110 |
| Share purchase plan, authorized amount                                  |   |   | 750            | 750            |   |   |
| Proceeds from issuance of preferred equity                              |   |   |           | 99             | $ 0    |   |
| Issuance costs of preferred equity                                      |   |   | 3              |           |   |   |
| ROU Assets                                                              |   |   | 273            | 273            |   | $ 0 |
| Lease liabilities                                                       |   |   | $ 280          | $ 280          |   |   |
| ASU 2016-02                                                             |   |   |           |           |   |   |
| **Finite-Lived Intangible Assets [Line Items]**                         |   |   |           |           |   |   |
| ROU Assets                                                              |   | $ 282  |           |           |   |   |
| Lease liabilities                                                       |   | 287    |           |           |   |   |
| Deferred tax impact                                                     |   | $ 5    |           |           |   |   |
| Noble Midstream                                                         |   |   |           |           |   |   |
| **Finite-Lived Intangible Assets [Line Items]**                         |   |   |           |           |   |   |
| Equity commitment                                                       | $ 200  |   |           |           |   |   |
| Proceeds from issuance of preferred equity                              | 100    |   |           |           |   |   |
| Issuance costs of preferred equity                                      | $ 3    |   |           |           |   |   |

| X                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Effective Tax Rate Reconciliation, Leasing Arrangements, Amount
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| X                                                                                                                                                                                                                                                                                                                           |
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| - Definition
Payment Of Stock Issuance Costs, Redeemable Convertible Preferred Stock
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| X                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Redeemable Convertible Preferred Stock, Commitment Amount
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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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| - Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Present value of lessee's discounted obligation for lease payments from operating lease.
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| - Definition
Amount of lessee's right to use underlying asset under operating lease.
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| - Definition
The cash inflow from issuance of callable preferred stock which is identified as being convertible to another type of financial security at the option of the issuer or the holder.
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| X                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of stock repurchase plan authorized.
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No definition available.
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| X                                                                                                                                    |
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