| **Marcellus Shale Firm Transportation Commitments - Income Statement Disclosures (Details) - USD ($) $ in Millions** | 12 Months Ended |
|----------------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Long-term Purchase Commitment [Line Items]**                                                                       |            |   |   |
| Purchased Oil and Gas                                                                                                | $ 296           | $ 0 | $ 0 |
| Purchased Oil and Gas | Operating Segments | United States                                                           |            |   |   |
| **Long-term Purchase Commitment [Line Items]**                                                                       |            |   |   |
| Sales of Purchased Oil and Gas                                                                                       | 113             | 0 | 0 |
| Purchased Oil and Gas                                                                                                | 108             | 0 | 0 |
| Firm Transportation Expense | Operating Segments | United States                                                     |            |   |   |
| **Long-term Purchase Commitment [Line Items]**                                                                       |            |   |   |
| Purchased Oil and Gas                                                                                                | 29              | 0 | 0 |
| Unutilized Firm Transportation Expense | Operating Segments | United States                                          |            |   |   |
| **Long-term Purchase Commitment [Line Items]**                                                                       |            |   |   |
| Purchased Oil and Gas                                                                                                | 3               | 0 | 0 |
| Sales of Purchased Gas, Net | Operating Segments | United States                                                     |            |   |   |
| **Long-term Purchase Commitment [Line Items]**                                                                       |            |   |   |
| Purchased Oil and Gas                                                                                                | $ 140           | $ 0 | $ 0 |

| X                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Revenue From Sales Of Purchased Oil And Gas
+ References
No definition available.
+ Details**Name:**nbl_RevenueFromSalesOfPurchasedOilAndGas**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Costs of generating revenue from oil and gas-related services including well services (such as drilling, rigs and analytic evaluations), transportation, and other supporting contractor services, during the reporting period.
+ References
No definition available.
+ Details**Name:**us-gaap_CostOfServicesOilAndGas**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**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:**srt_ProductOrServiceAxis=us-gaap_OilAndGasPurchasedMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_StatementBusinessSegmentsAxis=nbl_UnitedStatesMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                             |
|-----------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_ProductOrServiceAxis=nbl_FirmTransportationMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_ProductOrServiceAxis=nbl_UnutilizedFirmTransportationMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**srt_ProductOrServiceAxis=us-gaap_OilAndGasMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |