CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 614,046	$ 628,551
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale relating to BCE	0	(22,988)
Depreciation and amortization including nuclear fuel	731,643	711,587
Allowance for equity funds used during construction	(45,687)	(28,790)
Deferred income taxes	(9,629)	(13,351)
Deferred investment tax credit	(10,019)	(10,287)
Stock compensation	21,252	16,940
Changes in current assets and liabilities:
Customer and other receivables	(253,215)	(330,867)
Accrued unbilled revenues	(80,971)	(94,288)
Materials, supplies and fossil fuel	(37,251)	(34,493)
Income tax receivable	0	332
Deferred fuel and purchased power	(276,327)	(244,109)
Deferred fuel and purchased power amortization	358,871	340,030
Other current assets	(5,803)	(26,062)
Accounts payable	80,810	24,958
Accrued taxes	172,513	174,807
Other current liabilities	23,463	74,177
Change in long-term regulatory assets	72,050	32,132
Change in long-term regulatory liabilities	46,167	43,448
Change in other long-term assets	(222,252)	(126,379)
Change in operating lease assets	131,272	94,768
Change in other long-term liabilities	153,248	49,694
Change in operating lease liabilities	(135,866)	(89,479)
Net cash provided by operating activities	1,328,315	1,170,331
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,955,102)	(1,717,571)
Contributions in aid of construction	166,198	235,861
Proceeds from sale relating to BCE	0	64,322
Allowance for borrowed funds used during construction	(35,640)	(36,078)
Proceeds from nuclear decommissioning trusts sales and other special use funds	1,375,159	1,140,371
Investment in nuclear decommissioning trusts and other special use funds	(1,378,379)	(1,150,541)
Other	(5,350)	(5,687)
Net cash used for investing activities	(1,833,114)	(1,469,323)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	1,742,754	1,313,229
Repayment of long-term debt	(800,000)	(675,000)
Short-term borrowing and (repayments) - net	107,250	14,000
Short-term debt borrowings under term loan facility	400,000	350,000
Short-term debt repayments under term loan facility	(400,000)	(350,000)
Dividends paid on common stock	(315,463)	(294,589)
Common stock equity issuance and (purchases) - net	9,419
Common stock equity issuance and (purchases) - net		(3,804)
Palo Verde sale leaseback noncontrolling interest acquisition	(198,744)	0
Capital activities by noncontrolling interests	(13,370)	(10,628)
Net cash provided by financing activities	531,846	343,208
NET INCREASE IN CASH AND CASH EQUIVALENTS	27,047	44,216
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	3,838	4,955
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 30,885	$ 49,171