Schedule I - Condensed Financial Information of Registrant - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 4,832	$ 9,969
Accounts receivable	453,209	391,923
Income tax receivable	14,086	7,514
Other current assets	60,091	83,896
Total current assets	1,750,554	1,551,100
Investments and other assets
Other assets	125,672	97,884
Total investments and other assets	1,590,707	1,797,959
TOTAL ASSETS	22,723,405	22,003,222
Current liabilities
Accounts payable	430,425	393,083
Accrued taxes	164,440	168,645
Common dividends payable	97,895	95,988
Short-term borrowings	340,720	292,000
Current maturities of long-term debt	50,685	150,000
Operating lease liabilities	105,210	100,443
Other current liabilities	148,276	151,968
Total current liabilities	1,762,141	1,756,869
Deferred credits and other
Long-term debt less current maturities (Note 6)	7,741,286	6,913,735
Operating lease liabilities	639,247	728,401
Other	252,149	232,914
Total deferred credits and other	7,060,102	7,311,158
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
Common stock equity
Common stock	2,724,740	2,702,743
Accumulated other comprehensive loss (Note 19)	(31,435)	(54,861)
Retained earnings	3,360,347	3,264,719
Total shareholders’ equity	6,048,647	5,906,200
Noncontrolling interests	111,229	115,260
Total equity	6,159,876	6,021,460	$ 5,752,793	$ 5,553,188
TOTAL LIABILITIES AND EQUITY	22,723,405	22,003,222
Pinnacle West
Current assets
Cash and cash equivalents	0	594
Accounts receivable	132,061	125,457
Income tax receivable	14,494	1,498
Other current assets	288	13
Total current assets	146,843	127,562
Investments and other assets
Investments in subsidiaries	7,105,789	6,797,528
Deferred income taxes	1,521	19,520
Other assets	23,153	57,608
Total investments and other assets	7,130,463	6,874,656
TOTAL ASSETS	7,277,306	7,002,218
Current liabilities
Accounts payable	6,499	3,071
Accrued taxes	7,694	19,855
Common dividends payable	97,895	95,988
Short-term borrowings	15,720	13,300
Current maturities of long-term debt	0	150,000
Operating lease liabilities	117	107
Other current liabilities	14,637	14,684
Total current liabilities	142,562	297,005
Deferred credits and other
Long-term debt less current maturities (Note 6)	947,892	647,139
Pension liabilities	8,218	14,537
Operating lease liabilities	1,459	1,576
Other	17,299	20,501
Total deferred credits and other	26,976	36,614
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
Common stock equity
Common stock	2,719,735	2,696,342
Accumulated other comprehensive loss (Note 19)	(31,435)	(54,861)
Retained earnings	3,360,347	3,264,719
Total shareholders’ equity	6,048,647	5,906,200
Noncontrolling interests	111,229	115,260
Total equity	6,159,876	6,021,460
TOTAL LIABILITIES AND EQUITY	$ 7,277,306	$ 7,002,218