v3.25.1
Debt and Liquidity Matters - Schedule of Estimated Fair Value of Long-Term Debt, Including Current Maturities (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Estimated fair value of long-term debt, including current maturities    
Carrying Amount $ 8,860,736 $ 8,858,648
Fair Value 8,033,868 7,918,992
APS    
Estimated fair value of long-term debt, including current maturities    
Carrying Amount 7,491,990 7,490,878
Fair Value 6,596,763 6,525,248
Pinnacle West    
Estimated fair value of long-term debt, including current maturities    
Carrying Amount 1,368,746 1,367,770
Fair Value $ 1,437,105 $ 1,393,744