Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Net income	$ 1,051	$ 1,020
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	1,061	998
Deferred income taxes	308	626
Rate case amortization and accruals	(85)	(93)
Common equity component of allowance for funds used during construction	(11)	(8)
Net derivative gains	5	(4)
Unbilled revenue and net unbilled revenue deferrals	135	37
Gain on sale of solar electric production project	0	(1)
Other non-cash items, net	(44)	(38)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers	(246)	1
Materials and supplies, including fuel oil and gas in storage	(4)	2
Other receivables and other current assets	(31)	(39)
Taxes receivable	47	33
Prepayments	(487)	(433)
Accounts payable	(8)	(54)
Pensions and retiree benefits obligations, net	264	305
Pensions and retiree benefits contributions	(475)	(462)
Accrued taxes	(60)	(21)
Accrued interest	67	59
Superfund and environmental remediation costs, net	(14)	(9)
Distributions from equity investments	88	87
System benefit charge	74	194
Deferred charges, noncurrent assets and other regulatory assets	(223)	(18)
Deferred credits and other regulatory liabilities	382	(40)
Other current and noncurrent liabilities	(194)	85
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,600	2,227
INVESTING ACTIVITIES
Utility construction expenditures	(2,457)	(2,148)
Cost of removal less salvage	(188)	(185)
Non-utility construction expenditures	(193)	(288)
Proceeds from sale of assets	0	34
Other investing activities	29	32
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(2,947)	(2,585)
FINANCING ACTIVITIES
Net issuance/(payment) of short-term debt	775	(698)
Issuance of long-term debt	1,905	997
Retirement of long-term debt	(1,319)	(429)
Debt issuance costs	(21)	(12)
Common stock dividends	(631)	(600)
Issuance of common shares - public offering	0	343
Issuance of common shares for stock plans	39	37
NET CASH FLOWS FROM/(USED IN) FINANCING ACTIVITIES	748	(362)
CASH, TEMPORARY CASH INVESTMENTS, AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(599)	(720)
BALANCE AT BEGINNING OF PERIOD	844	830
BALANCE AT END OF PERIOD	245	110
Cash paid/(received) during the period for:
Interest	519	479
Income taxes	(1)	(34)
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	318	352
Issuance of common shares for dividend reinvestment	36	35
Software licenses acquired but unpaid as of end of period	100	0
CECONY
OPERATING ACTIVITIES
Net income	969	883
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	949	891
Deferred income taxes	346	566
Rate case amortization and accruals	(98)	(107)
Common equity component of allowance for funds used during construction	(10)	(7)
Unbilled revenue and net unbilled revenue deferrals	43	37
Other non-cash items, net	(20)	(51)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers	(218)	18
Materials and supplies, including fuel oil and gas in storage	(3)	(18)
Other receivables and other current assets	(47)	29
Accounts receivable from affiliated companies	(267)	12
Prepayments	(448)	(398)
Accounts payable	(32)	(20)
Accounts payable to affiliated companies	8	1
Pensions and retiree benefits obligations, net	242	274
Pensions and retiree benefits contributions	(436)	(416)
Accrued taxes	(63)	(18)
Accrued interest	67	61
Superfund and environmental remediation costs, net	(14)	(7)
System benefit charge	70	175
Accrued taxes to affiliated companies	(72)	(119)
Deferred charges, noncurrent assets and other regulatory assets	(158)	(60)
Deferred credits and other regulatory liabilities	376	77
Other current and noncurrent liabilities	(99)	(13)
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,085	1,790
INVESTING ACTIVITIES
Utility construction expenditures	(2,315)	(2,020)
Cost of removal less salvage	(183)	(179)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(2,498)	(2,199)
FINANCING ACTIVITIES
Net issuance/(payment) of short-term debt	854	(453)
Issuance of long-term debt	1,640	500
Retirement of long-term debt	(1,236)	0
Debt issuance costs	(18)	(7)
Capital contribution by parent	95	279
Dividend to parent	(635)	(597)
NET CASH FLOWS FROM/(USED IN) FINANCING ACTIVITIES	700	(278)
CASH, TEMPORARY CASH INVESTMENTS, AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(713)	(687)
BALANCE AT BEGINNING OF PERIOD	730	704
BALANCE AT END OF PERIOD	17	17
Cash paid/(received) during the period for:
Interest	424	388
Income taxes	268	96
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	279	240
Software licenses acquired but unpaid as of end of period	95	0
Electric and Gas Transmission Projects
INVESTING ACTIVITIES
Investments in projects	(123)	(29)
Renewable Electric Production Projects
INVESTING ACTIVITIES
Investments in projects	$ (15)	$ (1)