| **Capitalized Exploratory Well Costs and Undeveloped Leasehold Costs - Rollforward of Undeveloped Leasehold Costs (Details) $ in Millions** | 3 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------------------|----------------|
||
| **Proved Developed and Undeveloped Reserves [Roll Forward]**                                                                                |           |
| Undeveloped Leasehold Costs, Beginning of Period                                                                                            | $ 2,306        |
| Additions to Undeveloped Leasehold Costs                                                                                                    | 47             |
| Transfers to Proved Properties                                                                                                              | 0              |
| Assets Sold                                                                                                                                 | (2)            |
| Undeveloped Leasehold Costs, End of Period                                                                                                  | $ 2,351        |

| X                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Undeveloped Leasehold Costs, Additions
+ References
No definition available.
+ Details**Name:**nbl_UndevelopedLeaseholdCostsAdditions**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Undeveloped Leasehold Costs, Divestitures
+ References
No definition available.
+ Details**Name:**nbl_UndevelopedLeaseholdCostsDivestitures**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
Undeveloped Leasehold Costs, Transfers To Proved Properties
+ References
No definition available.
+ Details**Name:**nbl_UndevelopedLeaseholdCostsTransfersToProvedProperties**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - References
No definition available.
+ Details**Name:**srt_IncreaseDecreaseInProvedDevelopedAndUndevelopedReservesRollForward**Namespace Prefix:**srt_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |