ARIZONA PUBLIC SERVICE COMPANY - CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)
Plant in service and held for future use	$ 25,860,950	$ 24,211,167
Accumulated depreciation and amortization	(9,027,426)	(8,408,040)
Net	16,833,524	15,803,127
Construction work in progress	1,592,659	1,724,004
Palo Verde sale leaseback, net of accumulated depreciation of $268,894 and $264,624 (Note 17)	82,556	86,426
Intangible assets, net of accumulated amortization of $925,880 and $884,371	591,310	267,110
Nuclear fuel, net of accumulated amortization of $115,894 and $118,074	97,850	99,490
Total property, plant and equipment	19,197,899	17,980,157
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trusts (Notes 12 and 18)	1,282,845	1,201,246
Other special use funds (Notes 12, 17 and 18)	408,357	362,781
Assets from risk management activities (Note 15)	5,980	0
Other assets	115,095	102,845
Total investments and other assets	1,812,277	1,666,872
CURRENT ASSETS
Cash and cash equivalents	3,838	4,955
Customer and other receivables	525,608	513,892
Accrued unbilled revenues	176,903	167,553
Allowance for doubtful accounts (Note 2)	(24,849)	(22,433)
Materials and supplies (at average cost)	469,022	444,344
Fossil fuel (at average cost)	32,420	49,203
Income tax receivable (Note 4)	0	332
Assets from risk management activities (Note 15)	10,578	6,808
Deferred fuel and purchased power regulatory asset (Note 3)	287,597	463,195
Other regulatory assets (Note 3)	133,372	162,562
Other current assets	74,915	101,417
Total current assets	1,689,404	1,926,967
DEFERRED DEBITS
Regulatory assets (Notes 1, 3, 4 and 7)	1,389,489	1,390,279
Operating lease right-of-use assets (Note 8)	1,605,463	1,309,975
Assets for pension and other postretirement benefits (Note 7)	342,102	323,438
Other	66,126	63,465
Total deferred debits	3,403,180	3,087,157
TOTAL ASSETS	26,102,760	24,661,153
CAPITALIZATION
Retained earnings	3,666,959	3,466,317
Accumulated other comprehensive loss (Note 19)	(30,942)	(33,144)
Total shareholders’ equity	6,754,311	6,177,664
Noncontrolling interests (Note 17)	103,167	107,198
Total equity	6,857,478	6,284,862
Long-term debt less current maturities (Note 6)	8,058,648	7,540,622
CURRENT LIABILITIES
Short-term borrowings (Note 5)	568,450	609,500
Current maturities of long-term debt (Note 6)	800,000	875,000
Accounts payable	485,426	442,455
Accrued taxes	175,863	166,833
Accrued interest	81,799	72,916
Common dividends payable	106,592	99,813
Customer deposits	44,345	42,037
Liabilities from risk management activities (Note 15)	52,340	80,913
Liabilities for asset retirements (Note 11)	50,009	28,550
Operating lease liabilities (Note 8)	100,367	67,883
Less: current regulatory liabilities	206,955	209,923
Other current liabilities	171,651	193,524
Total current liabilities	2,843,797	2,889,347
DEFERRED CREDITS AND OTHER
Deferred income taxes (Note 4)	2,444,473	2,416,480
Regulatory liabilities (Notes 1, 3, 4 and 7)	1,855,278	1,965,865
Liabilities for asset retirements (Note 11)	1,096,577	937,451
Liabilities for pension benefits (Note 7)	139,317	112,702
Liabilities from risk management activities (Note 15)	9,446	42,975
Customer advances	569,343	533,580
Coal mine reclamation	171,483	184,007
Deferred investment tax credit	249,490	257,743
Unrecognized tax benefits (Note 4)	44,233	33,861
Operating lease liabilities (Note 8)	1,520,877	1,210,189
Other	242,320	251,469
Total deferred credits and other	8,342,837	7,946,322
COMMITMENTS AND CONTINGENCIES (Note 10)
TOTAL LIABILITIES AND EQUITY	26,102,760	24,661,153
Arizona Public Service Company
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)
Plant in service and held for future use	25,860,068	24,207,706
Accumulated depreciation and amortization	(9,026,544)	(8,404,721)
Net	16,833,524	15,802,985
Construction work in progress	1,592,659	1,724,004
Palo Verde sale leaseback, net of accumulated depreciation of $268,894 and $264,624 (Note 17)	82,556	86,426
Intangible assets, net of accumulated amortization of $925,880 and $884,371	591,154	266,955
Nuclear fuel, net of accumulated amortization of $115,894 and $118,074	97,850	99,490
Total property, plant and equipment	19,197,743	17,979,860
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trusts (Notes 12 and 18)	1,282,845	1,201,246
Other special use funds (Notes 12, 17 and 18)	374,156	362,781
Assets from risk management activities (Note 15)	5,980	0
Other assets	49,673	43,625
Total investments and other assets	1,712,654	1,607,652
CURRENT ASSETS
Cash and cash equivalents	3,815	4,549
Customer and other receivables	522,886	510,296
Accrued unbilled revenues	176,903	167,553
Allowance for doubtful accounts (Note 2)	(24,849)	(22,433)
Materials and supplies (at average cost)	469,022	444,344
Fossil fuel (at average cost)	32,420	49,203
Income tax receivable (Note 4)	5,463	0
Assets from risk management activities (Note 15)	10,578	6,808
Deferred fuel and purchased power regulatory asset (Note 3)	287,597	463,195
Other regulatory assets (Note 3)	133,372	162,562
Other current assets	65,754	64,311
Total current assets	1,682,961	1,850,388
DEFERRED DEBITS
Regulatory assets (Notes 1, 3, 4 and 7)	1,389,489	1,390,279
Operating lease right-of-use assets (Note 8)	1,604,324	1,308,611
Assets for pension and other postretirement benefits (Note 7)	335,458	316,606
Other	65,606	63,059
Total deferred debits	3,394,877	3,078,555
TOTAL ASSETS	25,988,235	24,516,455
CAPITALIZATION
Common stock	178,162	178,162
Additional paid-in capital	4,116,696	3,321,696
Retained earnings	3,992,423	3,759,299
Accumulated other comprehensive loss (Note 19)	(14,116)	(17,219)
Total shareholders’ equity	8,273,165	7,241,938
Noncontrolling interests (Note 17)	103,167	107,198
Total equity	8,376,332	7,349,136
Long-term debt less current maturities (Note 6)	7,190,878	7,041,891
Total capitalization	15,567,210	14,391,027
CURRENT LIABILITIES
Short-term borrowings (Note 5)	339,900	532,850
Current maturities of long-term debt (Note 6)	300,000	250,000
Accounts payable	481,955	433,229
Accrued taxes	181,698	162,288
Accrued interest	79,308	72,548
Common dividends payable	107,200	99,800
Customer deposits	44,345	42,037
Liabilities from risk management activities (Note 15)	52,340	80,913
Liabilities for asset retirements (Note 11)	50,009	28,550
Operating lease liabilities (Note 8)	100,229	67,608
Less: current regulatory liabilities	206,955	209,923
Other current liabilities	177,019	211,773
Total current liabilities	2,120,958	2,191,519
DEFERRED CREDITS AND OTHER
Deferred income taxes (Note 4)	2,419,937	2,431,697
Regulatory liabilities (Notes 1, 3, 4 and 7)	1,855,278	1,965,865
Liabilities for asset retirements (Note 11)	1,096,577	937,451
Liabilities for pension benefits (Note 7)	134,855	106,215
Liabilities from risk management activities (Note 15)	9,446	42,975
Customer advances	569,343	533,580
Coal mine reclamation	171,483	184,007
Deferred investment tax credit	249,490	257,743
Unrecognized tax benefits (Note 4)	48,725	33,861
Operating lease liabilities (Note 8)	1,519,683	1,208,857
Other	225,250	231,658
Total deferred credits and other	8,300,067	7,933,909
COMMITMENTS AND CONTINGENCIES (Note 10)
TOTAL LIABILITIES AND EQUITY	$ 25,988,235	$ 24,516,455