| Cover | Feb. 29, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 29, 2024 |
| Entity File Number | 1-8962 |
| Entity Registrant Name | PINNACLE WEST CAPITAL CORPORATION |
| Entity Central Index Key | 0000764622 |
| Entity Tax Identification Number | 86-0512431 |
| Entity Incorporation, State or Country Code | AZ |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | PNW |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
