XML 58 R46.htm IDEA: XBRL DOCUMENT
v3.23.1

Regulatory Matters - Retail Rate Case Filing (Details) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 06, 2023 USD ($) | Oct. 28, 2022 USD ($) $ / kWh | Sep. 23, 2022 MW | Jul. 12, 2022 USD ($) | Jun. 30, 2022 USD ($) | Mar. 31, 2022 MW | Dec. 17, 2021 USD ($) | Oct. 27, 2021 USD ($) | Aug. 02, 2021 USD ($) | Jun. 07, 2021 USD ($) | Jul. 01, 2020 USD ($) | Aug. 13, 2018 USD ($) | Mar. 27, 2017 USD ($) | Dec. 31, 2020 | Jul. 01, 2022 USD ($) | Apr. 30, 2022 USD ($) | Dec. 09, 2021 USD ($) | Jul. 01, 2021 USD ($)
ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue deficiency |  | $ 772,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proposed annual revenue increase |  |  |  |  |  |  |  |  |  |  |  | $ (86,500,000) |  |  |  |  |  |
Regulatory matters, no of basis penalty point | 0.0020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Program term |  |  |  |  |  |  |  |  |  |  |  |  |  | 18 years |  |  |  |
Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approximate percentage of increase in average residential customer bill |  | 13.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate matter, cost base rate |  |  |  |  | $ 10,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Base fuel rate (in dollars per kWh) | $ / kWh |  | 0.038321 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue decrease |  |  |  |  |  |  |  |  | $ 111,000,000 |  |  |  |  |  |  |  |  |
Recommended return on equity, percentage |  |  |  |  |  |  |  | 8.70% | 9.16% |  |  |  |  |  |  |  |  |
Increment of fair value rate, percentage |  |  |  |  |  |  |  |  | 0.30% |  |  |  |  |  |  |  |  |
Reduction on equity percentage |  |  |  |  |  |  |  |  | 0.03% |  |  |  |  |  |  |  |  |
Effective fair value percentage |  |  |  |  |  |  |  |  | 4.95% |  |  |  |  |  |  |  |  |
Net retail base rate, increase |  |  |  |  |  |  |  |  |  |  |  |  | $ 94,600,000 |  |  |  |  |
Non-fuel and non-depreciation base rate, increase |  |  |  |  |  |  |  |  |  |  |  |  | 87,200,000 |  |  |  |  |
Fuel-related base rate decrease |  |  |  |  |  |  |  |  |  |  |  |  | 53,600,000 |  |  |  |  |
Base rate increase, changes in depreciation schedules |  |  |  |  |  |  |  |  |  |  |  |  | $ 61,000,000 |  |  |  |  |
Commercial customers, market pricing, threshold | MW |  |  | 140 |  |  | 280 |  |  |  |  |  |  |  |  |  |  |  |
RES 2018 | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of proposed budget |  |  |  |  |  |  |  |  |  |  | $ 84,700,000 |  |  |  | $ 86,200,000 |  | $ 100,500,000 | $ 93,100,000
Revenue requirements |  |  |  |  |  |  |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |
Authorized amount to be collected |  |  |  |  |  |  |  |  |  | $ 68,300,000 |  |  |  |  |  |  |  |
Coal Community Transition Plan | ACC | Navajo Nation, Electrification Projects |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 |  |
Coal Community Transition Plan | ACC | Navajo Nation, Hopi Tribe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount recoverable through rates related to the CCT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |
Coal Community Transition Plan | ACC | Navajo Nation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount recoverable through rates related to the CCT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,660,000 |  |
Coal Community Transition Plan | ACC | Navajo Nation, Hopi Reservation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount recoverable through rates related to the CCT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,250,000 |  |
Coal Community Transition Plan | ACC | Navajo County Communities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount recoverable through rates related to the CCT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |
Coal Community Transition Plan | ACC | Navajo County Communities, CCT and Economic Development |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 |  |
Coal Community Transition Plan | ACC | Navajo Nation, Hopi Tribe for CCT and Economic Development |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,250,000 |  |
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation, Economic Development Organization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disallowance of annual amortization percentage |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  |
Amount funded by customers |  |  |  |  |  |  |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |
Amount funded by customers, term |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo County Communities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  | $ 500,000 | $ 5,000,000 |  |  |  |  |  |  |  |  |
Amount funded by shareholders, term |  |  |  |  |  |  |  | 60 days | 5 years |  |  |  |  |  |  |  |  |
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation, Hopi Tribe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  | $ 1,000,000 | $ 1,675,000 |  |  |  |  |  |  |  |  |
Amount funded by shareholders, term |  |  |  |  |  |  |  | 60 days |  |  |  |  |  |  |  |  |  |
Amount not recoverable |  |  |  |  |  |  |  | $ 215,500,000 |  |  |  |  |  |  |  |  |  |
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders, term |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation, Hopi Reservation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  | $ 1,250,000 |  |  |  |  |  |  |  |  |  |
Coal Community Transition Plan | Retail Rate Case Filing with Arizona Corporation Commission | ACC | APS | Navajo Nation Reservation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue decrease |  |  |  |  |  |  |  | 4,800,000 |  |  |  |  |  |  |  |  |  |
Amount funded by shareholders |  |  |  |  |  |  |  | $ 1,250,000 |  |  |  |  |  |  |  |  |  |
Disallowance of plant investments | $ 215,500,000 |  |  |  |  |  | $ 215,500,000 |  |  |  |  |  |  |  |  |  |  |
Solar Communities | RES 2018 | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Program term |  |  |  | 3 years |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Minimum | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual increase in retail base rates |  | $ 460,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum | RES 2018 | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized spending |  |  |  | $ 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Solar Communities | RES 2018 | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Required annual capital investment |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |
Maximum | RES 2018 | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized spending |  |  |  | $ 30,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Solar Communities | RES 2018 | ACC | APS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Required annual capital investment |  |  |  |  |  |  |  |  |  |  | $ 15,000,000 |  |  |  |  |  |  |

X
- Definition Base Fuel Rate + References No definition available. + Details
Name: | pnw_BaseFuelRate
Namespace Prefix: | pnw_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Commercial Customers, Market Pricing, Threshold + References No definition available. + Details
Name: | pnw_CommercialCustomersMarketPricingThreshold
Namespace Prefix: | pnw_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Disallowance Of Annual Amortization, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesDisallowanceOfAnnualAmortizationPercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Effective Fair Value Rate, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesEffectiveFairValueRatePercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Increment of Fair Value Rate, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesIncrementOfFairValueRatePercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Program Term + References No definition available. + Details
Name: | pnw_PublicUtilitiesProgramTerm
Namespace Prefix: | pnw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Recommended Return on Equity, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesRecommendedReturnOnEquityPercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Reduction Of Equity Rate, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesReductionOfEquityRatePercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Requested Rate Increase (Decrease), Income Tax Amount + References No definition available. + Details
Name: | pnw_PublicUtilitiesRequestedRateIncreaseDecreaseIncomeTaxAmount
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Required Annual Capital Investment + References No definition available. + Details
Name: | pnw_PublicUtilitiesRequiredAnnualCapitalInvestment
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Rate Matter, Approximate Percentage Of Increase In Average Residential Customer Bill + References No definition available. + Details
Name: | pnw_RateMatterApproximatePercentageOfIncreaseInAverageResidentialCustomerBill
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rate Matter, Cost Base Rate + References No definition available. + Details
Name: | pnw_RateMatterCostBaseRate
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of proposed budget. + References No definition available. + Details
Name: | pnw_RateMatterProposedBudget
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Rate Matters, Amount Authorized To Be Collected + References No definition available. + Details
Name: | pnw_RateMattersAmountAuthorizedToBeCollected
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Rate Matters, Authorized Spending In Capital Costs + References No definition available. + Details
Name: | pnw_RateMattersAuthorizedSpendingInCapitalCosts
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Rate Matters, Revenue Requirements + References No definition available. + Details
Name: | pnw_RateMattersRevenueRequirements
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recommended Rate Adjustment, Annualized Customer Impact, Disallowance Of Investments + References No definition available. + Details
Name: | pnw_RecommendedRateAdjustmentAnnualizedCustomerImpactDisallowanceOfInvestments
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Regulatory Impact, Operating Results + References No definition available. + Details
Name: | pnw_RegulatoryImpactOperatingResults
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Regulatory Impact, Total Revenue Deficiency + References No definition available. + Details
Name: | pnw_RegulatoryImpactTotalRevenueDeficiency
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Regulatory Matters, Amount Funded By Customers + References No definition available. + Details
Name: | pnw_RegulatoryMattersAmountFundedByCustomers
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Regulatory Matters, Amount Not Recoverable + References No definition available. + Details
Name: | pnw_RegulatoryMattersAmountNotRecoverable
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Regulatory Matters, Amounts Funded By Customers, Term + References No definition available. + Details
Name: | pnw_RegulatoryMattersAmountsFundedByCustomersTerm
Namespace Prefix: | pnw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Regulatory Matters, Amounts Funded By Shareholders + References No definition available. + Details
Name: | pnw_RegulatoryMattersAmountsFundedByShareholders
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Regulatory Matters, Amounts Funded By Shareholders, Term + References No definition available. + Details
Name: | pnw_RegulatoryMattersAmountsFundedByShareholdersTerm
Namespace Prefix: | pnw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Regulatory Matters, Amounts Recoverable by Rates + References No definition available. + Details
Name: | pnw_RegulatoryMattersAmountsRecoverableByRates
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Regulatory Matters, No of Basis Penalty Point + References No definition available. + Details
Name: | pnw_RegulatoryMattersNoOfBasisPenaltyPoint
Namespace Prefix: | pnw_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regulatory Matters, Revenue Increase (Decrease) + References No definition available. + Details
Name: | pnw_RegulatoryMattersRevenueIncreaseDecrease
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Settlement Agreement, Base Rate Increase, Changes In Depreciation Schedules + References No definition available. + Details
Name: | pnw_SettlementAgreementBaseRateIncreaseChangesInDepreciationSchedules
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of decrease in fuel-related base rates as per the terms of the settlement agreement of a regulatory matter. + References No definition available. + Details
Name: | pnw_SettlementAgreementFuelRelatedBaseRateDecrease
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Settlement Agreement, Net Retail Base Rate, Increase + References No definition available. + Details
Name: | pnw_SettlementAgreementNetRetailBaseRateIncrease
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Settlement Agreement, Non Fuel And Non Depreciation Base Rate, Increase + References No definition available. + Details
Name: | pnw_SettlementAgreementNonFuelAndNonDepreciationBaseRateIncrease
Namespace Prefix: | pnw_
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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=pnw_ArizonaCorporationCommissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=pnw_RetailRateCaseFilingwithArizonaCorporationCommissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesRegulatoryProceedingAxis=pnw_ArizonaRenewableEnergyStandardandTariff2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilityProgramAxis=pnw_CoalCommunityTransitionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoNationElectrificationProjectsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoNationHopiTribeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoNationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoNationHopiReservationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoCountyCommunitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoCountyCommunitiesCCTAndEconomicDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoNationHopiTribeForCCTAndEconomicDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoNationEconomicDevelopmentOrganizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoCountyCommunitiesChollaPowerPlantClosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilitiesRegulatoryRegulatoryMattersAxis=pnw_NavajoNationReservationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnw_PublicUtilityProgramAxis=pnw_SolarCommunitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |