| **Commitments and Contingencies Commitments and Contingencies (Details)**                                                                       | 1 Months Ended | 3 Months Ended  |
|-------------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Other Commitments [Line Items]**                                                                                                              |           |            |
| Additional expense due to unutilized firm transportation and shortfalls in delivering or transporting minimum volumes under certain commitments |           | $ 16,000,000    |
| CONSOL Carried Cost Obligation [Member]                                                                                                         |           |            |
| **Other Commitments [Line Items]**                                                                                                              |           |            |
| Equity method investment, ownership percentage                                                                                                  |           | 50.00%          |
| Maximum amount to be paid each calendar year for funding of future drilling and completion costs                                                |           | $ 400,000,000   |
| Funding of joint venture's future drilling and completion costs                                                                                 |           | $ 1,600,000,000 |
| Natural gas price agreed upon benchmark, average                                                                                                |           | 4.00            |
| Consent Decree [Member]                                                                                                                         |           |            |
| **Other Commitments [Line Items]**                                                                                                              |           |            |
| Civil penalty                                                                                                                                   |           | $ 4,950,000     |
| Mitigation projects                                                                                                                             |           | 4,500,000       |
| Supplemental environmental projects                                                                                                             |           | $ 4,000,000     |
| Pending Litigation [Member] | Unfavorable Regulatory Action [Member]                                                                            |           |            |
| **Other Commitments [Line Items]**                                                                                                              |           |            |
| Reduced penalty                                                                                                                                 | $ 223,475      |            |
| Maximum reduction to penalty                                                                                                                    | 80.00%         |            |

| X                                                                                                                                                                                                               |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Civil penalty
+ References
No definition available.
+ Details**Name:**nbl_Civilpenalty**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount agreed upon to provide funding of the entity's joint venture future drilling and completion costs.
+ References
No definition available.
+ Details**Name:**nbl_FundingOfJointVenturesFutureDrillingAndCompletionCosts**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Litigation Settlement, Reduction To Penalties
+ References
No definition available.
+ Details**Name:**nbl_LitigationSettlementReductionToPenalties**Namespace Prefix:**nbl_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The maximum amount of funding to be provided by the entity for future drilling and completion cost each calendar year.
+ References
No definition available.
+ Details**Name:**nbl_MaximumAmountToBePaidEachCalendarYearForFundingOfFutureDrillingAndCompletionCosts**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Mitigation projects
+ References
No definition available.
+ Details**Name:**nbl_Mitigationprojects**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Average natural gas price agreed upon benchmark for funding of future drilling and completion costs (in MMBtu's). If the average price of gas drops below benchmark for 3 consecutive months, capital carry will to be suspended until the average price of gas rises above the benchmark for a 3 consecutive month period.
+ References
No definition available.
+ Details**Name:**nbl_NaturalGasPriceAgreedUponBenchmarkAverage**Namespace Prefix:**nbl_**Data Type:**xbrli:decimalItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Supplemental environmental projects
+ References
No definition available.
+ Details**Name:**nbl_Supplementalenvironmentalprojects**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Unutilized Firm Transportation And Shortfalls Of Delivering Commitments
+ References
No definition available.
+ Details**Name:**nbl_UnutilizedFirmTransportationAndShortfallsOfDeliveringCommitments**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571
+ Details**Name:**us-gaap_EquityMethodInvestmentOwnershipPercentage**Namespace Prefix:**us-gaap_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of judgment or settlement awarded to (against) the entity in respect of litigation.
+ References
No definition available.
+ Details**Name:**us-gaap_LitigationSettlementAmount**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_OtherCommitmentsLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_OtherCommitmentsAxis=nbl_CONSOLCarriedCostObligationMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_OtherCommitmentsAxis=nbl_ConsentDecreeMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_UnfavorableRegulatoryActionMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |