XML 58 R46.htm IDEA: XBRL DOCUMENT
v3.22.2

Regulatory Matters - COVID-19 Pandemic (Details) - APS - USD ($) | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2021 | Jan. 21, 2021 | May 05, 2020
Public Utilities, General Disclosures [Line Items] |  |  |  |
Demand side management funds |  |  |  | $ 36,000,000
Customer credits |  | $ 43,000,000 |  |
Customer credits, additional funds |  | $ 7,000,000 |  |
Percentage increase under PSA effective for first billing cycle beginning April 2021 | 50.00% |  |  |
Remaining percentage increase under PSA effective for first billing cycle beginning November 2021 | 50.00% |  |  |
Damage from Fire, Explosion or Other Hazard |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Past due balance threshold qualifying for payment extension |  |  | $ 75 |

X
- Definition Customer Support Fund, Past Due Balance Threshold + References No definition available. + Details
Name: | pnw_CustomerSupportFundPastDueBalanceThreshold
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Demand Side Management Funds + References No definition available. + Details
Name: | pnw_RegulatoryMattersDemandSideManagementFunds
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Demand Side Management Funds, Customer Credits + References No definition available. + Details
Name: | pnw_RegulatoryMattersDemandSideManagementFundsCustomerCredits
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Demand Side Management Funds, Customer Credits, Additional Funds + References No definition available. + Details
Name: | pnw_RegulatoryMattersDemandSideManagementFundsCustomerCreditsAdditionalFunds
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Percentage Increase Due Under PSA In First Billing Cycle + References No definition available. + Details
Name: | pnw_RegulatoryMattersPercentageIncreaseDueUnderPSAInFirstBillingCycle
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Regulatory Matters, Remaining Percentage Increase Due Under PSA + References No definition available. + Details
Name: | pnw_RegulatoryMattersRemainingPercentageIncreaseDueUnderPSA
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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: | dei_LegalEntityAxis=pnw_ArizonaPublicServiceCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_DamageFromFireExplosionOrOtherHazardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |