Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Net income	$ 428	$ 388
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	348	329
Deferred income taxes	101	256
Rate case amortization and accruals	(28)	(31)
Common equity component of allowance for funds used during construction	(4)	(2)
Net derivative gains	(1)	(5)
Unbilled revenue and net unbilled revenue deferrals	48	(5)
Other non-cash items, net	(23)	0
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers	(147)	(66)
Materials and supplies, including fuel oil and gas in storage	33	26
Other receivables and other current assets	26	26
Taxes receivable	18	30
Prepayments	(422)	(394)
Accounts payable	30	(78)
Pensions and retiree benefits obligations, net	84	105
Pensions and retiree benefits contributions	(184)	(129)
Accrued taxes	(61)	(26)
Accrued interest	68	54
Superfund and environmental remediation costs, net	(2)	1
Distributions from equity investments	35	35
System benefit charge	63	65
Deferred charges, noncurrent assets and other regulatory assets	(246)	(53)
Deferred credits and other regulatory liabilities	179	(9)
Other current and noncurrent liabilities	(200)	(69)
NET CASH FLOWS FROM OPERATING ACTIVITIES	143	448
INVESTING ACTIVITIES
Utility construction expenditures	(790)	(714)
Cost of removal less salvage	(63)	(63)
Non-utility construction expenditures	(35)	(113)
Investments in electric and gas transmission projects	(32)	(5)
Proceeds from sale of assets	0	23
Other investing activities	11	16
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(909)	(856)
FINANCING ACTIVITIES
Net issuance/(payment) of short-term debt	812	(218)
Issuance of long-term debt	0	497
Retirement of long-term debt	(10)	(408)
Debt issuance costs	(1)	(4)
Common stock dividends	(209)	(199)
Issuance of common shares for stock plans	13	12
NET CASH FLOWS FROM/(USED IN) FINANCING ACTIVITIES	605	(320)
CASH, TEMPORARY CASH INVESTMENTS, AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(161)	(728)
BALANCE AT BEGINNING OF PERIOD	844	830
BALANCE AT END OF PERIOD	683	102
Cash paid/(received) during the period for:
Interest	124	123
Income taxes	(13)	(39)
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	352	282
Issuance of common shares for dividend reinvestment	12	12
CECONY
OPERATING ACTIVITIES
Net income	389	339
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	310	294
Deferred income taxes	108	234
Rate case amortization and accruals	(33)	(36)
Common equity component of allowance for funds used during construction	(3)	(2)
Unbilled revenue and net unbilled revenue deferrals	13	(5)
Other non-cash items, net	(10)	(8)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable – customers	(126)	(54)
Materials and supplies, including fuel oil and gas in storage	24	20
Other receivables and other current assets	(8)	33
Accounts receivable from affiliated companies	(19)	15
Prepayments	(417)	(373)
Accounts payable	37	(41)
Accounts payable to affiliated companies	7	0
Pensions and retiree benefits obligations, net	80	93
Pensions and retiree benefits contributions	(183)	(128)
Accrued taxes	(68)	(18)
Accrued interest	68	56
Superfund and environmental remediation costs, net	(3)	1
System benefit charge	59	59
Accrued taxes to affiliated companies	3	(21)
Deferred charges, noncurrent assets and other regulatory assets	(202)	(51)
Deferred credits and other regulatory liabilities	161	29
Other current and noncurrent liabilities	(131)	(56)
NET CASH FLOWS FROM OPERATING ACTIVITIES	56	380
INVESTING ACTIVITIES
Utility construction expenditures	(747)	(672)
Cost of removal less salvage	(61)	(61)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(808)	(733)
FINANCING ACTIVITIES
Net issuance/(payment) of short-term debt	763	(155)
Debt issuance costs	(1)	0
Capital contribution by parent	45	22
Dividend to parent	(211)	(199)
NET CASH FLOWS FROM/(USED IN) FINANCING ACTIVITIES	596	(332)
CASH, TEMPORARY CASH INVESTMENTS, AND RESTRICTED CASH:
NET CHANGE FOR THE PERIOD	(156)	(685)
BALANCE AT BEGINNING OF PERIOD	730	704
BALANCE AT END OF PERIOD	574	19
Cash paid/(received) during the period for:
Interest	93	91
Income taxes	18	(22)
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	$ 272	$ 217