Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OPERATING ACTIVITIES
Net income	$ 2,023	$ 1,820	$ 2,516
PRINCIPAL NON-CASH CHARGES (CREDITS) TO INCOME
Depreciation and amortization	2,321	2,155	2,031
Deferred income taxes	590	416	132
Rate case amortization and accruals	258	201	92
Net derivatives losses	0	0	12
Pre-tax loss (gain) on sale of the Clean Energy Businesses	0	62	(865)
Other non-cash items, net	(55)	(85)	(93)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers, net	(30)	(263)	(275)
Unbilled revenue and net unbilled revenue deferrals	15	75	(48)
Other receivables, net and other current assets	(33)	71	140
Taxes receivable	134	(144)	3
Prepayments	64	25	(200)
Accounts payable	161	(1)	(285)
Pensions and retiree benefits obligations, net	(582)	(284)	(179)
Pensions and retiree benefits contributions	(61)	(26)	(33)
Accrued taxes	33	(5)	(13)
Accrued interest	24	28	(7)
Superfund and other environmental costs, net	(22)	(43)	(12)
Distributions from equity investments	70	35	31
Deferred charges, noncurrent assets, leases, net and other regulatory assets	(721)	(797)	(1,200)
Deferred credits, noncurrent liabilities and other regulatory liabilities	448	475	196
Other current liabilities	163	(101)	213
NET CASH FLOWS FROM OPERATING ACTIVITIES	4,800	3,614	2,156
INVESTING ACTIVITIES
Utility capital expenditures	(4,764)	(4,770)	(4,353)
Cost of removal less salvage	(481)	(474)	(387)
Non-utility capital expenditures	0	(1)	(141)
Proceeds from sale of Broken Bow II, net of cash and cash equivalents sold	45	0	3,927
Other investing activities	(49)	(28)	(49)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(5,249)	(5,273)	(1,003)
FINANCING ACTIVITIES
Net payment of short-term debt (Maturities 90 days or less)	(895)	(118)	(202)
Short-term borrowings	300	0	0
Borrowing under term loan	200	500	200
Repayment of term loan	(200)	0	(750)
Issuance of long-term debt	1,150	2,975	2,050
Retirement of long-term debt	0	(477)	(710)
Debt issuance costs	(15)	(43)	(32)
Common stock dividends	(1,166)	(1,100)	(1,096)
Issuance of common shares - public offering	1,308	0	0
Issuance of common shares for stock plans	64	60	56
Repurchase of common shares	0	0	(1,000)
Distribution to noncontrolling interest	0	0	(4)
NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	746	1,797	(1,488)
CASH, TEMPORARY CASH INVESTMENTS, AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	297	138	(335)
BALANCE AT BEGINNING OF PERIOD	1,630	1,333	1,195
BALANCE AT END OF PERIOD	1,630	1,333	1,195
LESS: CASH AND RESTRICTED CASH BALANCES HELD FOR SALE	0	9	5
BALANCE AT END OF PERIOD EXCLUDING HELD FOR SALE	1,630	1,324	1,190
Cash paid (received) during the period for:
Interest, net of capitalized interest	1,147	1,072	987
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures in accounts payable	794	501	598
Issuance of common shares for dividend reinvestment	48	49	31
Equipment
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Equipment acquired but unpaid as of end of period	$ 0	$ 6	$ 11