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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 Close
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) Close
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 Close
CASH, TEMPORARY CASH INVESTMENTS AND RESTRICTED CASH:      
NET CHANGE FOR THE PERIOD (335) 384 (290) Close
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