| **Capitalized Exploratory Well Costs and Undeveloped Leasehold Costs - Narrative (Details) - USD ($) $ in Millions** | 12 Months Ended |         |         |
|----------------------------------------------------------------------------------------------------------------------|-----------------|---------|---------|
||
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**                             |            |    |    |
| Undeveloped leasehold costs, net                                                                                     | $ 2,373         | $ 2,922 | $ 2,197 |
| International                                                                                                        |            |    |    |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**                             |            |    |    |
| Capitalized undeveloped leasehold cost                                                                               | 53              |    |    |
| Domestic                                                                                                             |            |    |    |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**                             |            |    |    |
| Capitalized undeveloped leasehold cost                                                                               | 31              |    |    |
| Delaware Basin                                                                                                       |            |    |    |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**                             |            |    |    |
| Capitalized undeveloped leasehold cost                                                                               | 2,200           |    |    |
| Eagle Ford                                                                                                           |            |    |    |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**                             |            |    |    |
| Capitalized undeveloped leasehold cost                                                                               | $ 100           |    |    |

| X                                                                                                                                                                                                                                                               |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Capitalized Undeveloped Leasehold Cost
+ References
No definition available.
+ Details**Name:**nbl_CapitalizedUndevelopedLeaseholdCost**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Undeveloped Leasehold Costs, Net
+ References
No definition available.
+ Details**Name:**nbl_UndevelopedLeaseholdCostsNet**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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.
+ References
No definition available.
+ Details**Name:**us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                             |
|-----------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_StatementGeographicalAxis=nbl_InternationalMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_StatementGeographicalAxis=country_US**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=nbl_DelawareBasinMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=nbl_EagleFordMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |