0000764622 2026-03-10 2026-03-10 0000764622 pnw:ArizonaPublicServiceCompanyMember 2026-03-10 2026-03-10 false 0000764622 0000007286 false 8-K 2026-03-10 false false false false false 8-K 2026-03-10 1-8962 PINNACLE WEST CAPITAL CORPORATION 86-0512431 AZ 400 North Fifth Street, P.O. Box 53999 Phoenix AZ 85072-3999 602 250-1000 1-4473 ARIZONA PUBLIC SERVICE COMPANY 86-0011170 AZ 400 North Fifth Street, P.O. Box 53999 Phoenix AZ 85072-3999 602 250-1000 false false false false Common Stock PNW NYSE false