XML 124 R95.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Leases - Additional information (Details) $ in Billions | Dec. 31, 2021 USD ($) Counterparty
--- | ---
Leases [Abstract] |
Number of lease agreements, sell and lease back | Counterparty | 3
Lease not yet commenced | $ | $ 1.3

X
- Definition Lease Not yet Commenced, Liability, Lease and Nonlease Payments + References No definition available. + Details
Name: | pnw_LeaseNotyetCommencedLiabilityLeaseandNonleasePayments
Namespace Prefix: | pnw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number Of Lease Agreements, Lease And Sell Back + References No definition available. + Details
Name: | pnw_NumberOfLeaseAgreementsLeaseAndSellBack
Namespace Prefix: | pnw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration