| **Debt (Details) (USD $)**                                                                                                                                                                                                                                            | 9 Months Ended               | 12 Months Ended |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------|-----------------|
||
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | $ 4,134,000,000              |                 | $ 4,495,000,000 |  |
| Unamortized Discount                                                                                                                                                                                                                                                  | (17,000,000)                 |                 | (26,000,000) |  |
| Total Debt, Net of Discount                                                                                                                                                                                                                                           | 4,117,000,000                |                 | 4,469,000,000 |  |
| Long-term Debt Due After One Year                                                                                                                                                                                                                                     | 3,747,000,000                |                 | 4,100,000,000 |  |
| Credit Facility due October 14, 2016 [Member]                                                                                                                                                                                                                         |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 0                            | [1]             | 0 | [1] |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 0.00%                        |                 | 0.00% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Oct. 14,         2016        |                 | Oct. 14,         2016 |  |
| Revolving Credit Facility Maximum Borrowing Capacity                                                                                                                                                                                                                  | 4,000,000,000                |                 |   |  |
| Revolving Credit Facility, Maximum Borrowing Capacity before September 28, 2012                                                                                                                                                                                       | 3,000,000,000                |                 |   |  |
| Debt Issuance Costs Incurred                                                                                                                                                                                                                                          | 4,000,000                    |                 |   |  |
| CONSOL Installment Payments, due September 30, 2012 and 2013                                                                                                                                                                                                          |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 328,000,000                  |                 | 656,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 1.79%                        | [2]             | 1.76% | [2] |
| Debt instrument, maturity dates                                                                                                                                                                                                                                       | September 30, 2013           |                 | September 30, 2012 and 2013 |  |
| Long-Term Debt and Capital Lease Obligations, Current, net of discount                                                                                                                                                                                                | (322,000,000)                |                 | (324,000,000) |  |
| FPSO Lease Obligation                                                                                                                                                                                                                                                 |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 322,000,000                  |                 | 355,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 0.00%                        |                 | 0.00% |  |
| Long-Term Debt and Capital Lease Obligations, Current, net of discount                                                                                                                                                                                                | (48,000,000)                 |                 | (45,000,000) |  |
| 5 1/4% Senior Notes, due April 15, 2014                                                                                                                                                                                                                               |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 200,000,000                  |                 | 200,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 5.25%                        |                 | 5.25% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Apr. 15,         2014        |                 | Apr. 15,         2014 |  |
| 8 1/4% Senior Notes, due March 1, 2019                                                                                                                                                                                                                                |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 1,000,000,000                |                 | 1,000,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 8.25%                        |                 | 8.25% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Mar.        01,         2019 |                 | Mar.        01,         2019 |  |
| 4.15% Senior Notes, due December 15, 2021                                                                                                                                                                                                                             |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 1,000,000,000                |                 | 1,000,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 4.15%                        |                 | 4.15% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Dec. 15,         2021        |                 | Dec. 15,         2021 |  |
| 7¼% Senior Notes, due October 15, 2023                                                                                                                                                                                                                           |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 100,000,000                  |                 | 100,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 7.25%                        |                 | 7.25% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Oct. 15,         2023        |                 | Oct. 15,         2023 |  |
| 8% Senior Notes, due April 1, 2027                                                                                                                                                                                                                                    |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 250,000,000                  |                 | 250,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 8.00%                        |                 | 8.00% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Apr.        01,         2027 |                 | Apr.        01,         2027 |  |
| 6% Senior Notes, due March 1, 2041                                                                                                                                                                                                                                    |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | 850,000,000                  |                 | 850,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 6.00%                        |                 | 6.00% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Mar.        01,         2041 |                 | Mar.        01,         2041 |  |
| 7 1/4% Senior Debentures, due August 1, 2097                                                                                                                                                                                                                          |                         |                 |   |  |
| **Debt Instrument [Line Items]**                                                                                                                                                                                                                                      |                         |                 |   |  |
| Debt                                                                                                                                                                                                                                                                  | $ 84,000,000                 |                 | $ 84,000,000 |  |
| Interest Rate (percentage in hundredths)                                                                                                                                                                                                                              | 7.25%                        |                 | 7.25% |  |
| Debt instrument, maturity date                                                                                                                                                                                                                                        | Aug.        01,         2097 |                 | Aug.        01,         2097 |  |
|                                                                                                                                                                                                                                                                       |
| [1]Our Credit Agreement provides for a $4.0 billion unsecured revolving Credit Facility. The Credit Facility is available for general corporate purposes.[2]Imputed rate based on the prevailing market rates for similar debt instruments at the date of assessment. |

| X                                                                                                                                                                                                                                                                                                                                                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.).
+ References
No definition available.
+ Details**Name:**nbl_DebtInstrumentMaturityDates**Namespace Prefix:**nbl_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Maximum borrowing capacity under the credit facility prior to exercising option to increase the overall commitment to $4 billion on September 28, 2012 without consideration of any restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.
+ References
No definition available.
+ Details**Name:**nbl_LineOfCreditMaximumBorrowingCapacityBeforeSeptember282012**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5
+ Details**Name:**us-gaap_DebtInstrumentCarryingAmount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Interest rate stated in the contractual debt agreement.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
+ Details**Name:**us-gaap_DebtInstrumentInterestRateStatedPercentage**Namespace Prefix:**us-gaap_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_DebtInstrumentLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
+ Details**Name:**us-gaap_DebtInstrumentMaturityDate**Namespace Prefix:**us-gaap_**Data Type:**xbrli:dateItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400
+ Details**Name:**us-gaap_DebtInstrumentUnamortizedDiscount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5
+ Details**Name:**us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910
+ Details**Name:**us-gaap_LongTermDebt**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section H
+ Details**Name:**us-gaap_LongTermDebtAndCapitalLeaseObligations**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
+ Details**Name:**us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
+ Details**Name:**us-gaap_UnamortizedDebtIssuanceExpense**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |