Annual Rental Payments, Sale Leaseback Transaction

No definition available.

Name:	pnw_AnnualRentalPaymentsSaleLeasebackTransaction
Namespace Prefix:	pnw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of VIE lessor trusts with whom agreements have been made to sell and lease back interests in certain nuclear generating assets and related common facilities.

+ References

No definition available.

+ Details

Name:	pnw_NumberOfVIELessorTrusts
Namespace Prefix:	pnw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the period of lease entered into in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

No definition available.

+ Details

Name:	pnw_SaleLeasebackTransactionLeasePeriod
Namespace Prefix:	pnw_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of leases under which assets are retained through a specified period.

+ References

No definition available.

+ Details

Name:	pnw_SaleLeasebackTransactionNumberOfLeasesUnderWhichAssetsRetainedThroughSpecifiedPeriod
Namespace Prefix:	pnw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Variable Interest Entity, Entity Initial Loss Exposure to Noncontrolling Interests During Lease Extension Period, Amount

+ References

No definition available.

+ Details

Name:	pnw_VariableInterestEntityEntityInitialLossExposuretoNoncontrollingInterestsDuringLeaseExtensionPeriodAmount
Namespace Prefix:	pnw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Variable Interest Entity, Entity Loss Exposure to Noncontrolling Interests During Lease Extension Period, Amount

+ References

No definition available.

+ Details

Name:	pnw_VariableInterestEntityEntityLossExposureToNoncontrollingInterestsDuringLeaseExtensionPeriodAmount
Namespace Prefix:	pnw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669625-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669619-108580

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067

+ Details

Name:	us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=pnw_ArizonaPublicServiceCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pnw_SaleLeasebackTransactionPeriodAxis=pnw_SaleLeasebackTransactionPeriodThrough2033Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Palo Verde Sale Leaseback Variable Interest Entities - Narrative (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) powerPlant lease	Mar. 31, 2021 USD ($)	Dec. 31, 1986 trust
Palo Verde Sale Leaseback Variable Interest Entities
Net income attributable to noncontrolling interest	$ 4,306,000	$ 4,873,000
APS
Palo Verde Sale Leaseback Variable Interest Entities
Number of VIE lessor trusts	3		3
Net income attributable to noncontrolling interest	$ 4,306,000	4,873,000
Palo Verde VIE \| APS
Palo Verde Sale Leaseback Variable Interest Entities
Net income attributable to noncontrolling interest	4,000,000	$ 5,000,000
Initial loss exposure to the VIE's noncontrolling equity participants during lease extension period	315,000,000
Palo Verde VIE \| APS \| Maximum
Palo Verde Sale Leaseback Variable Interest Entities
Maximum loss exposure to the VIE's noncontrolling equity participants during lease extension period (up to)	$ 501,000,000
Palo Verde VIE \| APS \| Period through 2033
Palo Verde Sale Leaseback Variable Interest Entities
Number of leases under which assets are retained \| lease	3
Annual lease payments	$ 21,000,000
Palo Verde VIE \| APS \| Period through 2033 \| Maximum
Palo Verde Sale Leaseback Variable Interest Entities
Lease period (up to)	2 years