Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING ACTIVITIES
NET INCOME	$ 1,193	$ 1,092	$ 1,062
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	1,130	1,071	1,024
Deferred income taxes	653	518	40
Rate case amortization and accruals	(52)	121	21
Common equity component of allowance for funds used during construction	(5)	(2)	(4)
Net derivative (gains)/losses	3	128	(74)
Pre-tax gains on termination of LILO transactions	0	0	(95)
Pre-tax gain on sale of solar electric production projects	0	(45)	0
Other non-cash items, net	77	(35)	91
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers	96	44	(29)
Special deposits	5	312	(257)
Materials and supplies, including fuel oil and gas in storage	22	(10)	(33)
Other receivables and other current assets	(32)	4	34
Income taxes receivable	58	(224)	0
Prepayments	(14)	(27)	23
Accounts payable	(79)	(9)	(118)
Pensions and retiree benefits obligations, net	756	822	829
Pensions and retiree benefits contributions	(756)	(584)	(887)
Accrued taxes	(10)	(404)	314
Accrued interest	4	(113)	96
Superfund and environmental remediation costs, net	22	28	(4)
Distributions from equity investments	31	0	0
Deferred charges, noncurrent assets and other regulatory assets	(111)	(361)	(162)
Deferred credits and other regulatory liabilities	182	498	637
Other current and noncurrent liabilities	104	7	44
NET CASH FLOWS FROM OPERATING ACTIVITIES	3,277	2,831	2,552
INVESTING ACTIVITIES
Utility construction expenditures	(2,562)	(2,239)	(2,339)
Cost of removal less salvage	(219)	(216)	(217)
Non-utility construction expenditures	(492)	(180)	(199)
Investments in/acquisitions of renewable electric production projects	(299)	(293)	(175)
Proceeds from grants related to solar electric production projects	0	36	93
Proceeds from sale of solar electric production projects	0	108	0
Restricted cash	(13)	15	(22)
Proceeds from the termination of LILO transactions	0	0	200
Other investing activities	(72)	10	0
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(3,657)	(2,759)	(2,659)
FINANCING ACTIVITIES
Net issuance/(payment) of short-term debt	729	(651)	912
Issuance of long-term debt	1,147	1,850	919
Retirement of long-term debt	(500)	(480)	(709)
Debt issuance costs	(15)	(17)	(6)
Common stock dividends	(733)	(739)	(721)
Issuance of common shares for stock plans, net of repurchases	1	(10)	(8)
NET CASH FLOWS (USED IN)/FROM FINANCING ACTIVITIES	629	(47)	387
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	249	25	280
BALANCE AT BEGINNING OF PERIOD	699	674	394
BALANCE AT END OF PERIOD	948	699	674
LESS: HELD FOR SALE	4	0	0
BALANCE AT BEGINNING OF PERIOD	699	674
BALANCE AT END OF PERIOD EXCLUDING HELD FOR SALE	944	699	674
Cash paid/(received) during the period for:
Interest	597	561	574
Income taxes	(36)	633	69
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	279	179	174
Issuance of common shares for dividend reinvestment	28	11	10
CECONY
OPERATING ACTIVITIES
NET INCOME	1,084	1,058	1,020
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	1,040	991	946
Deferred income taxes	449	331	222
Rate case amortization and accruals	(74)	102	10
Common equity component of allowance for funds used during construction	(4)	(1)	(2)
Other non-cash items, net	(27)	(33)	(80)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers	87	59	(15)
Materials and supplies, including fuel oil and gas in storage	24	(12)	(15)
Other receivables and other current assets	38	48	(30)
Accounts receivables from affiliated companies	(58)	(13)	(58)
Prepayments	13	(24)	(21)
Accounts payable	(51)	(57)	(81)
Accounts payable to affiliates	(11)	(22)	23
Pensions and retiree benefits obligations, net	714	742	803
Pensions and retiree benefits contributions	(703)	(544)	(830)
Accrued taxes	3	0	9
Accrued taxes to affiliated companies	(8)	(403)	198
Accrued interest	1	(22)	6
Superfund and environmental remediation costs, net	19	32	(4)
Deferred charges, noncurrent assets and other regulatory assets	(150)	(334)	(148)
Deferred credits and other regulatory liabilities	379	475	666
Other current and noncurrent liabilities	54	57	24
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,819	2,430	2,643
INVESTING ACTIVITIES
Utility construction expenditures	(2,410)	(2,094)	(2,207)
Cost of removal less salvage	(212)	(210)	(210)
Restricted cash	(16)	0	0
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(2,638)	(2,304)	(2,417)
FINANCING ACTIVITIES
Net issuance/(payment) of short-term debt	583	(760)	789
Issuance of long-term debt	650	1,850	700
Retirement of long-term debt	(350)	(475)	(700)
Debt issuance costs	(7)	(17)	(7)
Capital contribution by parent	13	0	0
Dividend to parent	(872)	(712)	(728)
NET CASH FLOWS (USED IN)/FROM FINANCING ACTIVITIES	17	(114)	54
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	198	12	280
BALANCE AT BEGINNING OF PERIOD	645	633	353
BALANCE AT END OF PERIOD EXCLUDING HELD FOR SALE	843	645	633
Cash paid/(received) during the period for:
Interest	554	504	500
Income taxes	163	748	163
SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION
Construction expenditures in accounts payable	$ 210	$ 151	$ 116