CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 514,498	$ 520,512
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale relating to BCE	(6,423)	0
Depreciation and amortization including nuclear fuel	636,224	612,958
Deferred fuel and purchased power	(486,382)	(228,483)
Deferred fuel and purchased power amortization	420,277	171,607
Allowance for equity funds used during construction	(40,071)	(30,966)
Deferred income taxes	(35,258)	43,440
Deferred investment tax credit	73,003	(7,152)
Change in derivative instruments fair value	(778)	0
Stock compensation	12,304	12,824
Changes in current assets and liabilities:
Customer and other receivables	(214,291)	(213,181)
Accrued unbilled revenues	(62,234)	(87,043)
Materials, supplies and fossil fuel	(43,193)	(72,623)
Income tax receivable	14,087	7,514
Other current assets	(11,585)	54,272
Accounts payable	(79,603)	137,433
Accrued taxes	101,022	117,044
Other current liabilities	18,074	12,575
Change in margin and collateral accounts - assets	(418)	8,832
Change in other long-term assets	(71,897)	208,599
Change in operating lease assets	89,836	98,081
Change in other long-term liabilities	75,541	(235,986)
Change in operating lease liabilities	(68,834)	(98,343)
Net cash provided by operating activities	833,899	1,031,914
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,314,529)	(1,276,861)
Contributions in aid of construction	112,762	103,366
Proceeds from sale relating to BCE	17,500	0
Allowance for borrowed funds used during construction	(34,131)	(18,381)
Proceeds from nuclear decommissioning trusts sales and other special use funds	1,165,668	911,003
Investment in nuclear decommissioning trusts and other special use funds	(1,181,386)	(929,965)
Other	(1,788)	(11,057)
Net cash used for investing activities	(1,235,904)	(1,221,895)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	689,349	455,628
Short-term borrowing and (repayments) - net	56,400	174,820
Dividends paid on common stock	(288,456)	(282,838)
Repayment of long-term debt	(32,740)	(150,000)
Common stock equity issuances and (purchases) - net	(1,644)	62
Distributions to noncontrolling interests	(10,628)	(10,628)
Net cash provided by financing activities	412,281	187,044
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	10,276	(2,937)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	4,832	9,969
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 15,108	$ 7,032