v3.26.1
Business Segments (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]          
Number of reportable segments | segment     1    
Operating revenues $ 1,455,749 $ 1,358,751 $ 2,605,346 $ 2,391,031  
Fuel and purchased power 558,498 477,008 995,227 857,079  
Operations and maintenance 283,387 286,605 560,087 586,714  
Depreciation and amortization 243,226 228,893 483,084 463,833  
Taxes other than income taxes 61,684 57,651 123,656 117,005  
Allowance for equity funds used during construction 17,052 14,767 31,834 28,016  
Pension and other postretirement non-service credits, net 5,018 3,692 9,000 6,650  
Interest charges, net of allowance for borrowed funds used during construction (122,199) (101,968) (238,095) (196,809)  
Income (taxes) benefit 31,302 35,018 32,471 28,835  
Less: Comprehensive income attributable to noncontrolling interests 2,193 4,306 4,387 8,612  
Net income attributable to common shareholders, basic 178,574 192,564 211,494 187,920  
Total Assets 32,576,874   32,576,874   $ 30,031,599
Pinnacle West Consolidated | Pinnacle West Consolidated          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]          
Operating revenues 1,456,000 1,359,000 2,605,000 2,391,000  
Fuel and purchased power (558,000) (477,000) (995,000) (857,000)  
Operations and maintenance (283,000) (287,000) (560,000) (587,000)  
Depreciation and amortization (243,000) (229,000) (483,000) (464,000)  
Taxes other than income taxes (62,000) (58,000) (124,000) (117,000)  
Allowance for equity funds used during construction 17,000 15,000 32,000 28,000  
Pension and other postretirement non-service credits, net 5,000 4,000 9,000 7,000  
Other income and (expense), net 2,000 7,000 1,000 22,000  
Interest charges, net of allowance for borrowed funds used during construction (122,000) (102,000) (238,000) (197,000)  
Income (taxes) benefit (31,000) (35,000) (32,000) (29,000)  
Less: Comprehensive income attributable to noncontrolling interests (2,000) (4,000) (4,000) (9,000)  
Net income attributable to common shareholders, basic 179,000 193,000 211,000 188,000  
Total Assets 32,577,000   32,577,000   30,032,000
Regulated Electricity Segment          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]          
Operating revenues 1,456,000 1,359,000 2,605,000 2,391,000  
Fuel and purchased power (558,000) (477,000) (995,000) (857,000)  
Operations and maintenance (281,000) (285,000) (554,000) (582,000)  
Depreciation and amortization (243,000) (229,000) (483,000) (464,000)  
Taxes other than income taxes (62,000) (58,000) (124,000) (117,000)  
Allowance for equity funds used during construction 17,000 15,000 32,000 28,000  
Pension and other postretirement non-service credits, net 5,000 4,000 9,000 7,000  
Other income and (expense), net (8,000) (2,000) (10,000) 2,000  
Interest charges, net of allowance for borrowed funds used during construction (97,000) (80,000) (189,000) (159,000)  
Income (taxes) benefit (36,000) (39,000) (44,000) (36,000)  
Less: Comprehensive income attributable to noncontrolling interests (2,000) (4,000) (4,000) (9,000)  
Net income attributable to common shareholders, basic 191,000 204,000 243,000 204,000  
Total Assets 32,401,000   32,401,000   29,886,000
Other          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]          
Operating revenues 0 0 0 0  
Fuel and purchased power 0 0 0 0  
Operations and maintenance (2,000) (2,000) (6,000) (5,000)  
Depreciation and amortization 0 0 0 0  
Taxes other than income taxes 0 0 0 0  
Allowance for equity funds used during construction 0 0 0 0  
Pension and other postretirement non-service credits, net 0 0 0 0  
Other income and (expense), net 10,000 9,000 11,000 20,000  
Interest charges, net of allowance for borrowed funds used during construction (25,000) (22,000) (49,000) (38,000)  
Income (taxes) benefit 5,000 4,000 12,000 7,000  
Less: Comprehensive income attributable to noncontrolling interests 0 0 0 0  
Net income attributable to common shareholders, basic (12,000) $ (11,000) (32,000) $ (16,000)  
Total Assets $ 176,000   $ 176,000   $ 146,000