| **Equity Method Investments (Details) (USD $)In Millions, unless otherwise specified**                             | 12 Months Ended                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
||
| **Schedule of Equity Method Investments [Line Items]**                                                             |                                                                                                                                                                                     |  |   |  |   |
| Income (Loss) from Equity Method Investments, Net of Dividends or Distributions                                    | $ (33)us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions                                                                                                         |  | $ 17us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions |  | $ (7)us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions |
| Distributions from Equity Method Investments                                                                       | 156us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital                                                                                                     |  | 0us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital |  | 0us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital |
| Equity Method Investments                                                                                          | 325us-gaap_EquityMethodInvestments                                                                                                                                                       |  | 437us-gaap_EquityMethodInvestments |  | 367us-gaap_EquityMethodInvestments |
| **Equity Method Investment, Financial Statement, Reported Amounts [Abstract]**                                     |                                                                                                                                                                                     |  |   |  |   |
| Retained earnings related to undistributed earnings of equity method investees                                     | 100nbl_RetainedEarningsEquityMethodUndistributed                                                                                                                                         |  |   |  |   |
| **AMPCO Equity Method Investment, Difference Between Carrying Amount and Underlying Equity [Abstract]**            |                                                                                                                                                                                     |  |   |  |   |
| Difference between the carrying value of an equity method investment and the underlying net assets of the investee | 8us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity                                                                                                        |  |   |  |   |
| **Balance Sheet Information**                                                                                      |                                                                                                                                                                                     |  |   |  |   |
| Current Assets                                                                                                     | 412us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets                                                                                                             |  | 463us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets |  |   |
| Noncurrent Assets                                                                                                  | 1,169us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets                                                                                                        |  | 983us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets |  |   |
| Current Liabilities                                                                                                | 374us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities                                                                                                        |  | 373us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities |  |   |
| Noncurrent Liabilities                                                                                             | 33us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities                                                                                                      |  | 29us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities |  |   |
| **Statements of Operations Information**                                                                           |                                                                                                                                                                                     |  |   |  |   |
| Operating Revenues                                                                                                 | 1,142us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue                                                                                                                 |  | 1,256us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue |  | 1,173us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue |
| Operating Expenses                                                                                                 | 405us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales                                                                                                               |  | 388us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales |  | 361us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales |
| Operating Income                                                                                                   | 737us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss                                                                                                           |  | 868us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss |  | 812us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss |
| Other (Income), Net                                                                                                | (9)nbl_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeNet                                                                                                                |  | (14)nbl_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeNet |  | (5)nbl_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeNet |
| Income Before Income Taxes                                                                                         | 746nbl_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes                                                                                                      |  | 882nbl_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes |  | 817nbl_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLossBeforeTaxes |
| Income Tax Provision                                                                                               | 172nbl_EquityMethodInvestmentSummarizedFinancialInformationProvisionForIncomeTaxes                                                                                                       |  | 212nbl_EquityMethodInvestmentSummarizedFinancialInformationProvisionForIncomeTaxes |  | 200nbl_EquityMethodInvestmentSummarizedFinancialInformationProvisionForIncomeTaxes |
| Net Income                                                                                                         | 574us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss                                                                                                             |  | 670us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss |  | 617us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss |
| AMPCO [Member]                                                                                                     |                                                                                                                                                                                     |  |   |  |   |
| **Schedule of Equity Method Investments [Line Items]**                                                             |                                                                                                                                                                                     |  |   |  |   |
| Ownership interest in equity method investments (in hundredths)                                                    | 45.00%us-gaap_EquityMethodInvestmentOwnershipPercentage/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_AmpcoMember                                           |  |   |  |   |
| Equity Method Investments                                                                                          | 141us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_AmpcoMember                                                                |  | 139us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_AmpcoMember |  |   |
| Alba Plant [Member]                                                                                                |                                                                                                                                                                                     |  |   |  |   |
| **Schedule of Equity Method Investments [Line Items]**                                                             |                                                                                                                                                                                     |  |   |  |   |
| Ownership interest in equity method investments (in hundredths)                                                    | 28.00%us-gaap_EquityMethodInvestmentOwnershipPercentage/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_AlbaPlantMember                                       |  |   |  |   |
| Equity Method Investments                                                                                          | 82us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_AlbaPlantMember                                                             |  | 95us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_AlbaPlantMember |  |   |
| CONE Gathering LLC [Member]                                                                                        |                                                                                                                                                                                     |  |   |  |   |
| **Schedule of Equity Method Investments [Line Items]**                                                             |                                                                                                                                                                                     |  |   |  |   |
| Ownership interest in equity method investments (in hundredths)                                                    | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_ConeGatheringLlcMember                                |  |   |  |   |
| Distribution from Offering Proceeds                                                                                | 204us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativeProceedsReceivedOnAllTransactions/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_ConeGatheringLlcMember |  |   |  |   |
| Income (Loss) from Equity Method Investments, Net of Dividends or Distributions                                    | 48us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_ConeGatheringLlcMember           |  |   |  |   |
| Distributions from Equity Method Investments                                                                       | 156us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_ConeGatheringLlcMember   |  |   |  |   |
| Equity Method Investments                                                                                          | 82us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_ConeGatheringLlcMember                                                      | [1] | 184us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_ConeGatheringLlcMember | [1] |   |
| CONE Midstream [Member]                                                                                            |                                                                                                                                                                                     |  |   |  |   |
| **Schedule of Equity Method Investments [Line Items]**                                                             |                                                                                                                                                                                     |  |   |  |   |
| Ownership interest in equity method investments (in hundredths)                                                    | 32.00%us-gaap_EquityMethodInvestmentOwnershipPercentage/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_CONEMidstreamMember                                   |  |   |  |   |
| Other Investees [Member]                                                                                           |                                                                                                                                                                                     |  |   |  |   |
| **Schedule of Equity Method Investments [Line Items]**                                                             |                                                                                                                                                                                     |  |   |  |   |
| Equity Method Investments                                                                                          | $ 20us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_OtherInvesteesMember                                                      |  | $ 19us-gaap_EquityMethodInvestments/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis= nbl_OtherInvesteesMember |  |   |
|                                                                                                                    |
| [1]CONE Investments includes our investments in CONE Midstream and CONE Gathering.                                 |

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This item represents the disclosure of summarized financial information for unconsolidated subsidiaries and 50 percent-or-less owned entities accounted for using the equity method of accounting. Such summarized financial information may, at a minimum, include net earnings before provision for income taxes.
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| - Definition
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| - Definition
Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.
+ References
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| - Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.
+ References
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| - Definition
This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.
+ References
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| - Definition
The amount of the cost of sales reported by an equity method investment of the entity.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of current assets reported by an equity method investment of the entity.
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| - Definition
The amount of current liabilities reported by an equity method investment of the entity.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of gross profit (loss) reported by an equity method investment of the entity.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of net income (loss) reported by an equity method investment of the entity.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of noncurrent assets reported by an equity method investment of the entity.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of noncurrent liabilities reported by an equity method investment of the entity.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(g)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph bb -Article 1Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph g -Subparagraph 1, 2 -Article 4Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph w -Article 1
+ Details**Name:**us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.
+ References
No definition available.
+ Details**Name:**us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585
+ Details**Name:**us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Cash dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations that are returns of capital. Excludes dividends or distributions from equity method investments classified as operating activities.
+ References
No definition available.
+ Details**Name:**us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_ScheduleOfEquityMethodInvestmentsLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Cumulative amount of cash and other consideration received by subsidiary or equity method investee in exchange for shares or stock issued or sold. Include amounts of cash received, fair value of non-cash assets received, fair value of liabilities assumed, and fair value of any other forms of consideration.
+ References
No definition available.
+ Details**Name:**us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativeProceedsReceivedOnAllTransactions**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nbl_AmpcoMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nbl_ConeGatheringLlcMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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