| **Exit Costs - Transportation Commitments - Narrative (Details) - USD ($) $ in Millions** | 1 Months Ended | 3 Months Ended |
|-------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Long-term Purchase Commitment [Line Items]**                                            |           |           |   |
| Reduction of transportation contracts                                                     | $ 350          |           |   |
| Marcellus Shale Firm Transportation Agreement                                             |           |           |   |
| **Long-term Purchase Commitment [Line Items]**                                            |           |           |   |
| Commitment amount                                                                         |           | $ 1,100        |   |
| Firm Transportation Exit Cost Accrual                                                     |           | $ 92           | $ 0 |
| Maximum | Marcellus Shale Firm Transportation Agreement                                   |           |           |   |
| **Long-term Purchase Commitment [Line Items]**                                            |           |           |   |
| Term                                                                                      |           | 14 years       |   |
| Minimum | Marcellus Shale Firm Transportation Agreement                                   |           |           |   |
| **Long-term Purchase Commitment [Line Items]**                                            |           |           |   |
| Term                                                                                      |           | 4 years        |   |

| X                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Commitment Obligation, Term
+ References
No definition available.
+ Details**Name:**nbl_CommitmentObligationTerm**Namespace Prefix:**nbl_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Long-term Purchase Commitment, Accrual
+ References
No definition available.
+ Details**Name:**nbl_LongtermPurchaseCommitmentAccrual**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Long-term Purchase Commitment, Reduction
+ References
No definition available.
+ Details**Name:**nbl_LongtermPurchaseCommitmentReduction**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The minimum amount the entity agreed to spend under the long-term purchase commitment.
+ References
No definition available.
+ Details**Name:**us-gaap_LongTermPurchaseCommitmentAmount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| 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_LongTermPurchaseCommitmentLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_OtherCommitmentsAxis=nbl_MarcellusShaleFirmTransportationAgreementMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_RangeAxis=srt_MaximumMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_RangeAxis=srt_MinimumMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |