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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
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
Income tax receivable (Note 4) | 0 | 332
Fossil fuel (at average cost) | 32,420 | 49,203
Assets from risk management activities (Note 15) | 10,578 | 6,808
Assets held for sale (Note 20) | 0 | 35,139
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
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
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 $885,505 | 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
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
CURRENT LIABILITIES |  |
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
Short-term borrowings (Note 5) | 568,450 | 609,500
Current maturities of long-term debt (Note 6) | 800,000 | 875,000
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
Regulatory liabilities (Note 3) | 206,955 | 209,923
Other current liabilities | 171,651 | 193,524
Total current liabilities | 2,843,797 | 2,889,347
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 6) | 8,058,648 | 7,540,622
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) |  |
EQUITY |  |
Common stock, no par value; authorized 150,000,000 shares, 119,143,782 and 113,537,689 issued at respective dates | 3,121,617 | 2,752,676
Treasury stock at cost; 46,968 and 113,272 shares at respective dates | (3,323) | (8,185)
Total common stock | 3,118,294 | 2,744,491
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
TOTAL LIABILITIES AND EQUITY | $ 26,102,760 | $ 24,661,153

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- Definition The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481549/505-30-45-1 + Details
Name: | us-gaap_TreasuryStockValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant