XML 86 R50.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Financing - Short-term Debt (Details) - USD ($) | Oct. 23, 2015 | Sep. 30, 2015 | Dec. 31, 2014 | Jan. 08, 2014
--- | --- | --- | --- | ---
Short-term Debt [Line Items] |  |  |  |
Short-term debt |  | $ 102,600,000 | $ 105,600,000 |
Subsequent Event [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Remaining borrowing capacity | $ 795,500,000 |  |  |
PNMR Term Loan Agreement [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Weighted-average interest rate |  | 1.05% |  |
Short-term debt |  | $ 100,000,000 | 100,000,000 |
PNM Resources [Member] | Subsequent Event [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Remaining borrowing capacity | 293,800,000 |  |  |
Consolidated invested cash | 11,000,000 |  |  |
Public Service Company of New Mexico [Member] | Subsequent Event [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Remaining borrowing capacity | 396,800,000 |  |  |
Consolidated invested cash | 34,100,000 |  |  |
Public Service Company of New Mexico [Member] | Local Lines of Credit [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
NMPRC approved credit facility |  |  |  | $ 50,000,000
Short-term debt |  | 0 | 0 |
Public Service Company of New Mexico [Member] | Local Lines of Credit [Member] | Subsequent Event [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Remaining borrowing capacity | 50,000,000 |  |  |
Texas-New Mexico Power Company [Member] | Subsequent Event [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Remaining borrowing capacity | 54,900,000 |  |  |
Consolidated invested cash | 0 |  |  |
Texas-New Mexico Power Company [Member] | Subsequent Event [Member] | Affiliated Entity [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Short-term debt – affiliate | $ 36,800,000 |  |  |
Texas-New Mexico Power Company [Member] | Intercompany loan agreements [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Short-term debt - affiliate |  | 48,500,000 |  |
Revolving Credit Facility [Member] | PNM Resources [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Financing capacity |  | $ 300,000,000.0 |  |
Weighted-average interest rate |  | 1.69% |  |
Short-term debt |  | $ 2,600,000 | 600,000 |
Revolving Credit Facility [Member] | Public Service Company of New Mexico [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Financing capacity |  | 400,000,000.0 |  |
Short-term debt |  | 0 | 0 |
Revolving Credit Facility [Member] | Texas-New Mexico Power Company [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Financing capacity |  | 75,000,000.0 |  |
Short-term debt |  | 0 | $ 5,000,000 |
Revolving Credit Facility [Member] | Texas-New Mexico Power Company [Member] | First Mortgage Bonds Due 2014, Series 2009A, at 9 point 50 percent [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Collateral amount |  | $ 75,000,000 |  |

X
- Definition Debt Instruments, NMPRC Approved credit facility + References No definition available. + Details
Name: | pnm_DebtInstrumentsNMPRCApprovedcreditfacility
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Short Term Debt Due to Related Party + References No definition available. + Details
Name: | pnm_ShortTermDebtDueToRelatedParty
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentCollateralAmount
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 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=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount for notes payable (written promise to pay), due to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + 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.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 3: 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(a)(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. + References No definition available. + Details
Name: | us-gaap_RestrictedCashAndInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + 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 210.9-03.13) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 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(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: 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.(a),16(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 2, 3 -Article 9 + Details
Name: | us-gaap_ShortTermBorrowings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average interest rate of short-term debt outstanding. + 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 210.5-02.19(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_ShortTermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pnm_PnmrTermLoanAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=pnm_PublicServiceCompanyOfNewMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pnm_LocalLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=pnm_TexasNewMexicoPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_AffiliatedEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pnm_IntercompanyLoanAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pnm_FirstMortgageBondsDue2014Series2009AAt9Point50PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |