XML 69 R47.htm IDEA: XBRL DOCUMENT
v3.21.2

Regulatory Matters - COVID-19 (Details) - APS - USD ($) |  | 1 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 21, 2021 | Mar. 31, 2021 | Feb. 28, 2021 | Dec. 31, 2020 | Jun. 30, 2021 | May 05, 2020
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Percentage increase under PSA effective for first billing cycle beginning April 2021 |  | 50.00% | 50.00% |  |  |
Remaining percentage increase under PSA effective for first billing cycle beginning November 2021 |  | 50.00% | 50.00% |  |  |
Demand side management funds |  |  |  |  |  | $ 36,000,000
Customer credits |  |  |  |  | $ 43,000,000 |
Customer credits, additional funds |  |  |  |  | $ 7,000,000 |
Voluntary funds |  |  |  | $ 15,000,000 |  |
Customer COVID assistance |  |  |  | 12,400,000 |  |
Non-customer funds |  |  |  | 8,800,000 |  |
Bill credits for limited income customers |  |  |  | $ 3,600,000 |  |
Threshold percentage for deferral of potential recovery |  |  |  | 50.00% |  |
Threshold for deferral of potential recovery |  |  |  | $ 2,500,000 |  |
Customer support fund, bill credit |  |  |  | 100 |  |
Expanded credit for limited income customers |  |  |  | 300 |  |
Customer assistance, small customers, bill credit |  |  |  | 1,000 |  |
Additional bill credit for delinquent limited income customers |  |  |  | 250 |  |
Customer support fund, non-profits and community organizations |  |  |  | $ 2,700,000 |  |
Damage from Fire, Explosion or Other Hazard |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Customer support fund, payment period | 8 months |  |  |  |  |
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, Bill Credits + References No definition available. + Details
Name: | pnw_RegulatoryMattersBillCredits
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer Assistance, Small Customers, Bill Credit + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerAssistanceSmallCustomersBillCredit
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer COVID Assistance + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerCOVIDAssistance
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer Support Fund, Additional Bill Credit + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFundAdditionalBillCredit
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer Support Fund, Bill Credit + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFundBillCredit
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer Support Fund, Expanded Bill Credit + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFundExpandedBillCredit
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer Support Fund, Non-profits and Community Organizations + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFundNonprofitsandCommunityOrganizations
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer Support Fund, Payment Period + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFundPaymentPeriod
Namespace Prefix: | pnw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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, Non-Customer Funds + References No definition available. + Details
Name: | pnw_RegulatoryMattersNonCustomerFunds
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 Regulatory Matters, Voluntary Funds + References No definition available. + Details
Name: | pnw_RegulatoryMattersVoluntaryFunds
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Voluntary Funds, Percentage Threshold For Deferral Of Potential Recovery + References No definition available. + Details
Name: | pnw_RegulatoryMattersVoluntaryFundsPercentageThresholdForDeferralOfPotentialRecovery
Namespace Prefix: | pnw_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Regulatory Matters, Voluntary Funds, Threshold For Deferral Of Potential Recovery + References No definition available. + Details
Name: | pnw_RegulatoryMattersVoluntaryFundsThresholdForDeferralOfPotentialRecovery
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_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: |