Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING ACTIVITIES
Net Income	$ 2,516	$ 1,600	$ 1,193
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	2,031	2,056	2,032
Impairment of assets	0	0	443
Deferred income taxes	132	435	133
Rate case amortization and accruals	92	73	(16)
Net derivative (gains)/losses	12	(181)	(53)
Pre-tax gain on sale of the Clean Energy Businesses	(865)	0	0
Other non-cash items, net	(90)	90	127
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers	(275)	(285)	(411)
Unbilled revenue and net unbilled revenue deferrals	(48)	(96)	(53)
Allowance for uncollectible accounts – customers	38	5	169
Materials and supplies, including fuel oil and gas in storage	38	(111)	(82)
Revenue decoupling mechanism receivable	(39)	26	(53)
Other receivables and other current assets	141	(21)	(157)
Prepayments	(200)	26	(24)
Accounts payable	(285)	558	44
Pensions and retiree benefits obligations, net	(201)	176	266
Pensions and retiree benefits contributions	(33)	(39)	(472)
Accrued taxes	(13)	7	(46)
Accrued interest	(7)	42	4
Superfund and environmental remediation costs	(12)	(22)	(10)
Distributions from equity investments	31	20	18
Deferred charges, noncurrent assets, leases, net and other regulatory assets	(1,216)	(870)	(496)
Deferred credits, noncurrent liabilities and other regulatory liabilities	196	445	258
Other current liabilities	213	1	(81)
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,156	3,935	2,733
INVESTING ACTIVITIES
Utility construction expenditures	(4,353)	(3,824)	(3,630)
Cost of removal less salvage	(387)	(337)	(323)
Non-utility construction expenditures	(141)	(344)	(323)
Proceeds from sale of the Clean Energy Businesses, net of cash and cash equivalents sold	3,927	0	629
Divestiture of renewable electric projects	0	0	183
Other investing activities	(49)	(60)	(20)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,003)	(4,565)	(3,484)
FINANCING ACTIVITIES
Net (payment)/issuance of short-term debt	(752)	1,702	(382)
Issuance of long-term debt	2,050	800	2,804
Retirement of long-term debt	(710)	(406)	(1,960)
Debt issuance costs	(32)	(13)	(40)
Common stock dividends	(1,096)	(1,089)	(1,030)
Issuance of common shares - public offering	0	0	775
Issuance of common shares for stock plans	56	57	60
Repurchase of common shares	(1,000)	0	0
Distribution to noncontrolling interest	(4)	(37)	(23)
Sale of equity interest	0	0	257
NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	(1,488)	1,014	461
CASH, TEMPORARY CASH INVESTMENTS AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(335)	384	(290)
BALANCE AT BEGINNING OF PERIOD	1,530	1,146	1,436
BALANCE AT END OF PERIOD	1,195	1,530	1,146
Total cash, temporary cash investments and restricted cash	1,195	1,530	1,146
LESS: CHANGE IN CASH BALANCES HELD FOR SALE	5	248	0
BALANCE AT END OF PERIOD EXCLUDING HELD FOR SALE	1,190	1,282	1,146
Cash paid during the period for:
Interest	987	900	924
Income taxes	397	47	9
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	598	681	457
Issuance of common shares for dividend reinvestment	31	31	49
Software Licenses
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	0	2	23
Equipment
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Capital expenditures incurred but unpaid as of end of period	$ 11	$ 17	$ 22