XML 60 R47.htm IDEA: XBRL DOCUMENT
v3.20.2

Regulatory Matters - Regulatory Matters - COVID-19 (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Oct. 21, 2020 | May 05, 2020
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Pre-tax income | $ 428,479,000 | $ 370,415,000 | $ 682,656,000 | $ 561,723,000 |  |
APS |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Pre-tax income | 437,097,000 | $ 379,897,000 | 703,536,000 | $ 588,012,000 |  |
Demand side management funds |  |  |  |  |  | $ 36,000,000
Customer credits | 43,000,000 |  | 43,000,000 |  |  |
Customer credits, additional funds | 7,000,000 |  | 7,000,000 |  |  |
Voluntary funds | 8,000,000 |  | 8,000,000 |  |  | 5,300,000
Customer COVID assistance | $ 6,800,000 |  | $ 6,800,000 |  |  |
Customer support fund |  |  |  |  |  | 1,500,000
Customer support fund, bill credit |  |  |  |  |  | 100
COVID bill credit |  |  |  |  |  | 100
Customer assistance, small customers, bill credit |  |  |  |  |  | $ 1,000
APS | Subsequent Event |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
COVID, support |  |  |  |  | $ 4,300,000 |
Customer support fund, non-profits and community organizations |  |  |  |  | $ 1,250,000 |

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 + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFund
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, COVID-19 Bill Credit + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFundCOVID19BillCredit
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Regulatory Matters, Customer Support Fund, COVID-19, Support + References No definition available. + Details
Name: | pnw_RegulatoryMattersCustomerSupportFundCOVID19Support
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, 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, 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 Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
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_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_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |