Long-Term Debt and Liquidity Matters - Fair Value of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Estimated fair value of long-term debt, including current maturities
Carrying Amount	$ 7,791,971	$ 7,063,735
Fair Value	6,585,701	7,726,354
Arizona Public Service Company
Estimated fair value of long-term debt, including current maturities
Carrying Amount	6,793,529	6,266,693
Fair Value	5,629,491	6,933,619
Bright Canyon Energy Corporation
Estimated fair value of long-term debt, including current maturities
Carrying Amount	50,550	0
Fair Value	50,685	0
Pinnacle West
Estimated fair value of long-term debt, including current maturities
Carrying Amount	947,892	797,042
Fair Value	$ 905,525	$ 792,735