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Earnings Per Share and Equity Forward Sale Agreements (Tables)
 6 Months Ended
Jun. 30, 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):
 Three Months Ended June 30,Six Months Ended June 30,
 2024202320242023
Net income attributable to common shareholders
$203,805 $106,663 $220,667 $103,366 
Weighted average common shares outstanding — basic
113,695 113,411 113,658 113,385 
Net effect of dilutive securities:
Contingently issuable performance shares and restricted stock units489 306 408 272 
Dilutive shares related to equity forward sale agreements1,619 — 949 — 
Total contingently issuable shares2,108 306 1,357 272 
Weighted average common shares outstanding — diluted
115,803 113,717 115,015 113,657 
Earnings per weighted-average common share outstanding:
Net income attributable to common shareholders — basic
$1.79 $0.94 $1.94 $0.91 
Net income attributable to common shareholders — diluted
$1.76 $0.94 $1.92 $0.91