XML 20 R48.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Palo Verde Sale Leaseback Variable Interest Entities - Narrative (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 07, 2014 Lease | Jun. 30, 2015 USD ($) power_plant | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) power_plant | Jun. 30, 2014 USD ($) | Dec. 31, 1986 Trust
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts |  | $ 4,605 | $ 8,926 | $ 9,210 | $ 17,851 |
Arizona Public Service Company |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Number of VIE lessor trusts |  | 3 |  | 3 |  | 3
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts |  | $ 4,605 | 8,926 | $ 9,210 | 17,851 |
Arizona Public Service Company | Consolidation of VIEs |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Increase in net income due to consolidation of Palo Verde Sale Leaseback Trusts |  | $ 5,000 | $ 9,000 | 9,000 | $ 18,000 |
Maximum payment to the VIEs' noncontrolling equity participants upon the occurrence of certain unlikely events |  |  |  | 114,000 |  |
VIE debt to be assumed upon the occurrence of certain unlikely events |  |  |  | 1,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Through 2023 |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Number of leases under which assets are retained | Lease | 1 |  |  |  |  |
Arizona Public Service Company | Consolidation of VIEs | Through 2033 |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Number of leases under which assets are retained | Lease | 2 |  |  |  |  |
Arizona Public Service Company | Consolidation of VIEs | 2015 |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Annual lease payments |  |  |  | 49,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Period 2016 through 2023 |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Annual lease payments |  |  |  | 23,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Period 2024 through 2033 |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Annual lease payments |  |  |  | $ 16,000 |  |
Arizona Public Service Company | Consolidation of VIEs | Period 2024 through 2033 | Maximum |  |  |  |  |  |
Palo Verde Sale Leaseback Variable Interest Entities |  |  |  |  |  |
Lease period |  |  |  | 2 years |  |

X
- Definition Number of VIE lessor trusts with whom agreements have been made to sell and lease back interests in certain nuclear generating assets and related common facilities. + References No definition available. + Details
Name: | pnw_NumberOfVIELessorTrusts
Namespace Prefix: | pnw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the period of lease entered into in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller. + References No definition available. + Details
Name: | pnw_SaleLeasebackTransactionLeasePeriod
Namespace Prefix: | pnw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of leases under which assets are retained through a specified period. + References No definition available. + Details
Name: | pnw_SaleLeasebackTransactionNumberOfLeasesUnderWhichAssetsRetainedThroughSpecifiedPeriod
Namespace Prefix: | pnw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Required payment to Variable Interest Entity Noncontrolling interest holders upon the occurrence of certain events. + References No definition available. + Details
Name: | pnw_VariableInterestEntityEntityMaximumLossExposureToNoncontrollingInterestsPaymentAmount
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of exposure to loss, upon the occurrence of certain events, in the form of assumed debt that is already reflected in the Consolidated Balance Sheets, as a result of involvement with the Variable Interest Entity (VIE). + References No definition available. + Details
Name: | pnw_VariableInterestEntityLossExposureToDebtAssumedAmount
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 + Details
Name: | us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The yearly payments due under the lease entered into in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6456341&loc=d3e50796-112755 + Details
Name: | us-gaap_SaleLeasebackTransactionAnnualRentalPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_SaleLeasebackTransactionPeriodAxis=pnw_SaleLeasebackTransactionPeriodThrough2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_SaleLeasebackTransactionPeriodAxis=pnw_SaleLeasebackTransactionPeriodThrough2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_SaleLeasebackTransactionPeriodAxis=pnw_SaleLeasebackTransactionPeriod2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_SaleLeasebackTransactionPeriodAxis=pnw_SaleLeasebackTransactionPeriod2016Through2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_SaleLeasebackTransactionPeriodAxis=pnw_SaleLeasebackTransactionPeriod2024Through2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |