Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OPERATING ACTIVITIES
NET INCOME	$ 1,062	$ 1,141	$ 1,062
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	1,024	955	884
Deferred income taxes	40	584	491
Rate case amortization and accruals	10	42	49
Common equity component of allowance for funds used during construction	(4)	(4)	(11)
Net derivative (gains)/losses	(74)	(68)	19
Pre-tax gains on the termination of LILO transactions	(95)
Other non-cash items (net)	91	52	128
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable-customers, less allowance for uncollectibles	(29)	(99)	50
Special deposits	(257)	(13)	(4)
Materials and supplies, including fuel oil and gas in storage	(33)	26	(8)
Other receivables and other current assets	34	40	55
Prepayments	23	(14)	196
Accounts payable	(118)	111	(195)
Pensions and retiree benefits obligations	829	903	635
Pensions and retiree benefits contributions	(887)	(870)	(628)
Accrued taxes	314	(26)	98
Accrued interest	96	(7)	5
Superfund and environmental remediation costs (net)	(4)	7	(9)
Deferred charges, noncurrent assets and other regulatory assets	(202)	(306)	24
Deferred credits and other regulatory liabilities	627	92	234
Other assets	61	(31)
Other liabilities	44	84	62
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,552	2,599	3,137
INVESTING ACTIVITIES
Utility construction expenditures	(2,339)	(1,917)	(1,887)
Cost of removal less salvage	(217)	(175)	(167)
Non-utility construction expenditures	(199)	(152)	(80)
Investments in solar energy projects	(175)	(309)	(20)
Proceeds from grants related to solar energy projects	93	30	4
Increase in restricted cash	(22)
Proceeds from the termination of LILO transactions	200
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(2,659)	(2,523)	(2,150)
FINANCING ACTIVITIES
Net proceeds of short-term debt	912	539
Issuance of long-term debt	919	400
Retirement of long-term debt	(709)	(305)	(4)
Debt issuance costs	(6)	(4)
Common stock dividends	(721)	(709)	(693)
Issuance of common shares for stock plans, net of repurchases	(8)	(9)	31
Preferred stock dividends		(3)	(11)
Preferred stock redemption		(239)
NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	387	(330)	(677)
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	280	(254)	310
BALANCE AT BEGINNING OF PERIOD	394	648	338
BALANCE AT END OF PERIOD	674	394	648
Cash paid/(refunded) during the period for:
Interest	574	571	563
Income taxes	69	46	(236)
CECONY [Member]
OPERATING ACTIVITIES
NET INCOME	1,020	1,017	989
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	946	894	829
Deferred income taxes	222	365	462
Rate case amortization and accruals	10	42	49
Common equity component of allowance for funds used during construction	(2)	(2)	(8)
Other non-cash items (net)	(80)	14	96
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable-customers, less allowance for uncollectibles	(15)	(131)	48
Materials and supplies, including fuel oil and gas in storage	(15)	23	(2)
Other receivables and other current assets	(88)	(40)	170
Prepayments	(21)	4	(3)
Accounts payable	(58)	102	(132)
Pensions and retiree benefits obligations	803	837	544
Pensions and retiree benefits contributions	(830)	(804)	(576)
Accrued taxes	207	94	95
Accrued interest	6		3
Superfund and environmental remediation costs (net)	(4)	9	(9)
Deferred charges, noncurrent assets and other regulatory assets	(148)	(239)	102
Deferred credits and other regulatory liabilities	666	100	224
Other liabilities	24	61	52
NET CASH FLOWS FROM OPERATING ACTIVITIES	2,643	2,346	2,933
INVESTING ACTIVITIES
Utility construction expenditures	(2,207)	(1,788)	(1,785)
Cost of removal less salvage	(210)	(170)	(162)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(2,417)	(1,958)	(1,947)
FINANCING ACTIVITIES
Net proceeds of short-term debt	789	421
Issuance of long-term debt	700	400
Retirement of long-term debt	(700)	(300)
Debt issuance costs	(7)	(4)
Dividend to parent	(728)	(682)	(681)
Preferred stock dividends		(3)	(11)
Preferred stock redemption		(239)
NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	54	(407)	(692)
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	280	(19)	294
BALANCE AT BEGINNING OF PERIOD	353	372	78
BALANCE AT END OF PERIOD	633	353	372
Cash paid/(refunded) during the period for:
Interest	500	513	504
Income taxes	$ 163	$ 62	$ (198)