XML 89 R68.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Regulatory Matters - Capital Structure and Costs of Capital (Details) - Arizona Public Service Company | Oct. 28, 2022
--- | ---
Cost Of Capital [Abstract] |
Requested Long-term debt cost of capital, percentage | 3.85%
Requested equity cost of capital, percentage | 10.25%
Requested weighted average cost of capital, percentage | 7.17%
Retail Rate Case Filing with Arizona Corporation Commission |
Capital Structure |
Requested equity capital structure, percentage | 51.93%
Retail Rate Case Filing with Arizona Corporation Commission | ACC |
Capital Structure |
Requested debt capital structure, percentage | 48.07%

X
- Definition Capital Structure [Abstract] + References No definition available. + Details
Name: | pnw_CapitalStructureAbstract
Namespace Prefix: | pnw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cost Of Capital [Abstract] + References No definition available. + Details
Name: | pnw_CostOfCapitalAbstract
Namespace Prefix: | pnw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Requested Equity Cost Of Capital, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesRequestedEquityCostOfCapitalPercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Requested Long-Term Debt Cost Of Capital, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesRequestedLongTermDebtCostOfCapitalPercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Requested Weighted Average Cost Of Capital, Percentage + References No definition available. + Details
Name: | pnw_PublicUtilitiesRequestedWeightedAverageCostOfCapitalPercentage
Namespace Prefix: | pnw_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of public utility's requested debt to capital, including debt and equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedDebtCapitalStructurePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of public utility's requested equity to capital, including debt and equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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_PublicUtilitiesRegulatoryProceedingAxis=pnw_RetailRateCaseFilingwithArizonaCorporationCommissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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