CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 189,880	$ 259,950
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	405,127	350,536
Deferred fuel and purchased power	(98,707)	(135,905)
Deferred fuel and purchased power amortization	96,842	10,828
Allowance for equity funds used during construction	(21,833)	(19,197)
Deferred income taxes	22,169	30,231
Deferred investment tax credit	(2,538)	(3,651)
Changes in current assets and liabilities:
Customer and other receivables	(31,146)	(41,138)
Accrued unbilled revenues	(100,543)	(91,721)
Materials, supplies and fossil fuel	(34,315)	(31,449)
Income tax receivable	7,514	6,792
Other current assets	5,195	(14,021)
Accounts payable	104,849	66,558
Accrued taxes	13,282	23,486
Other current liabilities	(7,316)	(39,638)
Change in margin and collateral accounts — assets	40,430	0
Change in other long-term assets	174,013	(152,846)
Change in operating lease assets	29,759	34,810
Change in other long-term liabilities	(184,626)	76,290
Change in operating lease liabilities	(27,622)	(31,049)
Net cash provided by operating activities	588,286	312,350
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(843,219)	(681,148)
Contributions in aid of construction	68,879	32,104
Allowance for borrowed funds used during construction	(10,111)	(10,193)
Proceeds from nuclear decommissioning trusts sales and other special use funds	692,186	587,842
Investment in nuclear decommissioning trusts and other special use funds	(692,811)	(588,982)
Other	(9,174)	10,809
Net cash used for investing activities	(794,250)	(649,568)
CASH FLOWS FROM FINANCING ACTIVITIES
Short-term borrowing and (repayments) — net	249,000	354,700
Dividends paid on common stock	(188,542)	(183,500)
Distributions to noncontrolling interests	(10,628)	(10,628)
Net cash provided by financing activities	225,184	291,396
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	19,220	(45,822)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	9,969	59,968
CASH AND CASH EQUIVALENTS AT END OF PERIOD	29,189	14,146
APS
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	202,781	263,647
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	405,085	350,494
Deferred fuel and purchased power	(98,707)	(135,905)
Deferred fuel and purchased power amortization	96,842	10,828
Allowance for equity funds used during construction	(21,833)	(19,197)
Deferred income taxes	(2,838)	23,161
Deferred investment tax credit	(2,538)	(3,651)
Changes in current assets and liabilities:
Customer and other receivables	(31,612)	(41,963)
Accrued unbilled revenues	(100,543)	(91,721)
Materials, supplies and fossil fuel	(34,315)	(31,449)
Income tax receivable	10,756	0
Other current assets	(7,883)	(12,636)
Accounts payable	101,931	66,192
Accrued taxes	39,408	44,439
Other current liabilities	2,384	(39,749)
Change in margin and collateral accounts — assets	40,430	0
Change in other long-term assets	183,701	(148,912)
Change in operating lease assets	29,613	34,758
Change in other long-term liabilities	(184,896)	77,323
Change in operating lease liabilities	(27,470)	(30,996)
Net cash provided by operating activities	600,296	314,663
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(824,269)	(681,148)
Contributions in aid of construction	68,879	32,104
Allowance for borrowed funds used during construction	(10,111)	(10,193)
Proceeds from nuclear decommissioning trusts sales and other special use funds	692,186	587,842
Investment in nuclear decommissioning trusts and other special use funds	(692,811)	(588,982)
Other	566	2,986
Net cash used for investing activities	(765,560)	(657,391)
CASH FLOWS FROM FINANCING ACTIVITIES
Short-term borrowing and (repayments) — net	236,300	495,000
Equity infusion	150,000	0
Dividends paid on common stock	(192,000)	(187,000)
Distributions to noncontrolling interests	(10,628)	(10,628)
Net cash provided by financing activities	183,672	297,372
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	18,408	(45,356)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	9,374	57,310
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 27,782	$ 11,954