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Common Stock Equity and Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2024
Earnings Per Share [Abstract] |
Schedule of Earnings Per Weighted Average Common Share Outstanding | The following table presents the calculation of Pinnacle West’s basic and diluted EPS (in thousands, except per share amounts):
|  |  |  |  |  |  |  |  |  | 2024 |  | 2023 |  | 2022
Net income attributable to common shareholders |  |  |  |  |  |  |  |  |  | $ | 608,806 |  |  | $ | 501,557 |  |  | $ | 483,602 |
Weighted average common shares outstanding — basic |  |  |  |  |  |  |  |  |  | 113,846 |  |  | 113,442 |  |  | 113,196 |
Net effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingently issuable performance shares and restricted stock units |  |  |  |  |  |  |  |  |  | 480 |  |  | 362 |  |  | 220 |
Dilutive shares related to equity forward sale agreements (a) |  |  |  |  |  |  |  |  |  | 1,906 |  |  | — |  |  | — |
Total contingently issuable shares |  |  |  |  |  |  |  |  |  | 2,386 |  |  | 362 |  |  | 220 |
Weighted average common shares outstanding — diluted |  |  |  |  |  |  |  |  |  | 116,232 |  |  | 113,804 |  |  | 113,416 |
Earnings per weighted-average common share outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to common shareholders — basic |  |  |  |  |  |  |  |  |  | $ | 5.35 |  |  | $ | 4.42 |  |  | $ | 4.27 |
Net income attributable to common shareholders — diluted |  |  |  |  |  |  |  |  |  | $ | 5.24 |  |  | $ | 4.41 |  |  | $ | 4.26 |
(a) For the years ended December 31, 2024, 2023 and 2022, diluted weighted average common shares excludes 1,038,463, 0 and 0 shares, respectively, relating to the Convertible Notes and the ATM equity forward. These potentially issuable shares were excluded from the calculation of diluted shares as their inclusion would have been antidilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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