ARIZONA PUBLIC SERVICE COMPANY - CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	$ 24,461,914	$ 24,211,167
Accumulated depreciation and amortization	(8,594,795)	(8,408,040)
Net	15,867,119	15,803,127
Construction work in progress	1,685,365	1,724,004
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	85,459	86,426
Intangible assets, net of accumulated amortization	512,874	267,110
Nuclear fuel, net of accumulated amortization	113,825	99,490
Total property, plant and equipment	18,264,642	17,980,157
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trusts (Notes 11 and 12)	1,239,024	1,201,246
Other special use funds (Notes 11 and 12)	364,225	362,781
Other assets	106,830	102,845
Total investments and other assets	1,710,079	1,666,872
CURRENT ASSETS
Cash and cash equivalents	9,634	4,955
Customer and other receivables	425,716	513,892
Accrued unbilled revenues	166,479	167,553
Allowance for doubtful accounts (Note 2)	(19,224)	(22,433)
Materials and supplies (at average cost)	438,943	444,344
Fossil fuel (at average cost)	50,230	49,203
Assets from risk management activities (Note 7)	78	6,808
Deferred fuel and purchased power regulatory asset (Note 4)	387,737	463,195
Other regulatory assets (Note 4)	191,132	162,562
Other current assets	131,257	101,417
Total current assets	1,781,982	1,926,967
DEFERRED DEBITS
Regulatory assets (Note 4)	1,371,260	1,390,279
Operating lease right-of-use assets	1,325,138	1,309,975
Assets for pension and other postretirement benefits (Note 5)	334,765	323,438
Other	59,847	63,465
Total deferred debits	3,091,010	3,087,157
TOTAL ASSETS	24,847,713	24,661,153
CAPITALIZATION
Retained earnings	3,483,178	3,466,317
Accumulated other comprehensive loss (Note 13)	(32,582)	(33,144)
Total shareholder equity	6,199,029	6,177,664
Noncontrolling interests (Note 6)	111,504	107,198
Total equity	6,310,533	6,284,862
Long-term debt less current maturities (Note 3)	7,541,871	7,540,622
CURRENT LIABILITIES
Short-term borrowings (Note 3)	793,500	609,500
Accounts payable	476,629	442,455
Accrued taxes	224,851	166,833
Accrued interest	74,001	72,916
Common dividends payable	0	99,813
Customer deposits	42,059	42,037
Liabilities from risk management activities (Note 7)	113,530	80,913
Liabilities for asset retirements	33,048	28,550
Operating lease liabilities	69,102	67,883
Regulatory liabilities (Note 4)	221,552	209,923
Other current liabilities	132,597	193,524
Total current liabilities	3,055,869	2,889,347
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,396,743	2,416,480
Regulatory liabilities (Note 4)	1,966,120	1,965,865
Liabilities for asset retirements	946,457	937,451
Liabilities for pension benefits (Note 5)	110,597	112,702
Liabilities from risk management activities (Note 7)	34,872	42,975
Customer advances	533,180	533,580
Coal mine reclamation	185,229	184,007
Deferred investment tax credit	257,448	257,743
Unrecognized tax benefits	34,511	33,861
Operating lease liabilities	1,225,468	1,210,189
Other	248,815	251,469
Total deferred credits and other	7,939,440	7,946,322
COMMITMENTS AND CONTINGENCIES (Note 8)
TOTAL LIABILITIES AND EQUITY	24,847,713	24,661,153
APS
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	24,458,518	24,207,706
Accumulated depreciation and amortization	(8,591,536)	(8,404,721)
Net	15,866,982	15,802,985
Construction work in progress	1,685,365	1,724,004
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	85,459	86,426
Intangible assets, net of accumulated amortization	512,719	266,955
Nuclear fuel, net of accumulated amortization	113,825	99,490
Total property, plant and equipment	18,264,350	17,979,860
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trusts (Notes 11 and 12)	1,239,024	1,201,246
Other special use funds (Notes 11 and 12)	364,225	362,781
Other assets	43,676	43,625
Total investments and other assets	1,646,925	1,607,652
CURRENT ASSETS
Cash and cash equivalents	9,494	4,549
Customer and other receivables	422,651	510,296
Accrued unbilled revenues	166,479	167,553
Allowance for doubtful accounts (Note 2)	(19,224)	(22,433)
Materials and supplies (at average cost)	438,943	444,344
Fossil fuel (at average cost)	50,230	49,203
Assets from risk management activities (Note 7)	78	6,808
Deferred fuel and purchased power regulatory asset (Note 4)	387,737	463,195
Other regulatory assets (Note 4)	191,132	162,562
Other current assets	76,154	64,311
Total current assets	1,723,674	1,850,388
DEFERRED DEBITS
Regulatory assets (Note 4)	1,371,260	1,390,279
Operating lease right-of-use assets	1,323,837	1,308,611
Assets for pension and other postretirement benefits (Note 5)	327,836	316,606
Other	59,447	63,059
Total deferred debits	3,082,380	3,078,555
TOTAL ASSETS	24,717,329	24,516,455
CAPITALIZATION
Common stock	178,162	178,162
Additional paid-in capital	3,321,696	3,321,696
Retained earnings	3,774,414	3,759,299
Accumulated other comprehensive loss (Note 13)	(16,729)	(17,219)
Total shareholder equity	7,257,543	7,241,938
Noncontrolling interests (Note 6)	111,504	107,198
Total equity	7,369,047	7,349,136
Long-term debt less current maturities (Note 3)	7,042,930	7,041,891
Total capitalization	14,411,977	14,391,027
CURRENT LIABILITIES
Short-term borrowings (Note 3)	733,500	532,850
Current maturities of long-term debt (Note 3)	250,000	250,000
Accounts payable	470,973	433,229
Accrued taxes	222,033	162,288
Accrued interest	71,988	72,548
Common dividends payable	0	99,800
Customer deposits	42,059	42,037
Liabilities from risk management activities (Note 7)	113,530	80,913
Liabilities for asset retirements	33,048	28,550
Operating lease liabilities	68,878	67,608
Regulatory liabilities (Note 4)	221,552	209,923
Other current liabilities	125,305	211,773
Total current liabilities	2,352,866	2,191,519
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,434,844	2,431,697
Regulatory liabilities (Note 4)	1,966,120	1,965,865
Liabilities for asset retirements	946,457	937,451
Liabilities for pension benefits (Note 5)	104,669	106,215
Liabilities from risk management activities (Note 7)	34,872	42,975
Customer advances	533,180	533,580
Coal mine reclamation	185,229	184,007
Deferred investment tax credit	257,448	257,743
Unrecognized tax benefits	37,007	33,861
Operating lease liabilities	1,224,170	1,208,857
Other	228,490	231,658
Total deferred credits and other	7,952,486	7,933,909
COMMITMENTS AND CONTINGENCIES (Note 8)
TOTAL LIABILITIES AND EQUITY	$ 24,717,329	$ 24,516,455