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Document Entity and Information DEI
May 08, 2020
Entity Information [Line Items]  
Entity Central Index Key 0000764622
Document Type 8-K
Document Period End Date May 08, 2020
Entity File Number 1-8962
Entity Emerging Growth Company false
Title of 12(b) Security Common Stock
Soliciting Material false
Written Communications false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Trading Symbol PNW
Security Exchange Name NYSE
Entity Registrant Name PINNACLE WEST CAPITAL CORPORATION
Entity Tax Identification Number 86-0512431
Entity Address, Address Line One 400 North Fifth Street, P.O. Box 53999
Entity Address, City or Town Phoenix
Entity Address, State or Province AZ
Entity Address, Postal Zip Code 85072-3999
City Area Code (602)
Local Phone Number 250-1000
Amendment Flag false
Entity Incorporation, State or Country Code AZ
Arizona Public Service Company [Member]  
Entity Information [Line Items]  
Entity Central Index Key 0000007286
Document Type 8-K
Document Period End Date May 08, 2020
Entity File Number 1-4473
Entity Emerging Growth Company false
Soliciting Material false
Written Communications false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Registrant Name ARIZONA PUBLIC SERVICE COMPANY
Entity Tax Identification Number 86-0011170
Entity Address, Address Line One 400 North Fifth Street, P.O. Box 53999
Entity Address, City or Town Phoenix
Entity Address, State or Province AZ
Entity Address, Postal Zip Code 85072-3999
City Area Code (602)
Local Phone Number 250-1000
Amendment Flag false
Entity Incorporation, State or Country Code AZ