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Long-Term Debt and Liquidity Matters - Components of Long-Term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Long-Term Debt and Liquidity Matters [Line Items]    
Total long-term debt $ 7,791,971 $ 7,063,735
TOTAL LONG-TERM DEBT LESS CURRENT MATURITIES 7,741,286 6,913,735
Pinnacle West    
Long-Term Debt and Liquidity Matters [Line Items]    
Gross long-term debt 7,844,660  
Unamortized discount (25) (34)
Unamortized debt issuance cost (2,083) (2,924)
Total long-term debt 947,892 797,042
Less current maturities 0 150,000
Total long-term debt less current maturities 947,892 647,042
TOTAL LONG-TERM DEBT LESS CURRENT MATURITIES 947,892 647,139
Arizona Public Service Company    
Long-Term Debt and Liquidity Matters [Line Items]    
Gross long-term debt 6,843,975  
Unamortized discount (14,548) (14,995)
Unamortized premium 12,368 13,575
Unamortized debt issuance cost (48,266) (47,862)
Total long-term debt 6,793,529 6,266,693
Less current maturities 0 0
Total long-term debt less current maturities 6,793,529 6,266,693
TOTAL LONG-TERM DEBT LESS CURRENT MATURITIES 6,793,529 6,266,693
Bright Canyon Energy Corporation    
Long-Term Debt and Liquidity Matters [Line Items]    
Gross long-term debt 50,685  
Los Alamitos equity bridge loan 27,575 0
Los Alamitos construction facility 23,110 0
Unamortized debt issuance cost (135) 0
Total long-term debt 50,550 0
Less current maturities 50,685 0
Total long-term debt less current maturities (135) 0
Pollution Control Bonds - Variable | Arizona Public Service Company    
Long-Term Debt and Liquidity Matters [Line Items]    
Gross long-term debt $ 163,975 $ 35,975
Weighted-average interest rate (as a percent) 3.96% 0.22%
Total Pollution Control Bonds | Arizona Public Service Company    
Long-Term Debt and Liquidity Matters [Line Items]    
Gross long-term debt $ 163,975 $ 35,975
Senior Unsecured Notes | Pinnacle West    
Long-Term Debt and Liquidity Matters [Line Items]    
Gross long-term debt $ 500,000 500,000
Interest rate (as a percent) 1.30%  
Senior Unsecured Notes | Arizona Public Service Company    
Long-Term Debt and Liquidity Matters [Line Items]    
Gross long-term debt $ 6,680,000 6,280,000
Senior Unsecured Notes | Arizona Public Service Company | Minimum    
Long-Term Debt and Liquidity Matters [Line Items]    
Interest rate (as a percent) 2.20%  
Senior Unsecured Notes | Arizona Public Service Company | Maximum    
Long-Term Debt and Liquidity Matters [Line Items]    
Interest rate (as a percent) 6.88%  
Term Loan | Pinnacle West    
Long-Term Debt and Liquidity Matters [Line Items]    
Term loans $ 450,000 $ 300,000
Term Loan | Arizona Public Service Company    
Long-Term Debt and Liquidity Matters [Line Items]    
Weighted-average interest rate (as a percent) 5.10% 0.81%
Variable Rate Construction Facility | Bright Canyon Energy Corporation    
Long-Term Debt and Liquidity Matters [Line Items]    
Weighted-average interest rate (as a percent) 5.71%  
Bridge Loan | Bright Canyon Energy Corporation    
Long-Term Debt and Liquidity Matters [Line Items]    
Weighted-average interest rate (as a percent) 5.18%