Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES
NET INCOME	$ 828	$ 934
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	764	709
Deferred income taxes	116	344
Rate case amortization and accruals	1	32
Common equity component of allowance for funds used during construction	(2)	(3)
Net derivative (gains)/losses	(6)	(61)
Pre-tax gains on the termination of LILO transactions	(95)
Other non-cash items (net)	46	(53)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	(51)	(196)
Special deposits	(305)
Materials and supplies, including fuel oil and gas in storage	(38)	1
Other receivables and other current assets	(8)	54
Prepayments	(362)	(288)
Accounts payable	(193)	18
Pensions and retiree benefits obligations	665	713
Pensions and retiree benefits contributions	(887)	(821)
Accrued taxes	217	(80)
Accrued interest	171	46
Superfund and environmental remediation costs (net)	(6)	7
Deferred charges, noncurrent assets and other regulatory assets	(6)	183
Deferred credits and other regulatory liabilities	291	83
Other assets	51
Other liabilities	47	16
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,238	1,638
INVESTING ACTIVITIES
Utility construction expenditures	(1,701)	(1,450)
Cost of removal less salvage	(144)	(118)
Non-utility construction expenditures	(149)	(68)
Investments in solar energy projects	(174)	(258)
Proceeds from grants related to solar energy projects	88	27
Increase in restricted cash	(15)
Proceeds from the termination of LILO transactions	200
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,895)	(1,867)
FINANCING ACTIVITIES
Net proceeds of short-term debt	681	340
Preferred stock redemption		(239)
Issuance of long-term debt	919	400
Retirement of long-term debt	(707)	(304)
Issuance of common shares for stock plans, net of repurchases	(4)	(16)
Debt issuance costs	(12)	(4)
Common stock dividends	(540)	(524)
Preferred stock dividends		(3)
NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	337	(350)
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	(320)	(579)
BALANCE AT BEGINNING OF PERIOD	394	648
BALANCE AT END OF PERIOD	74	69
Cash paid during the period for:
Interest	372	379
Income taxes	27	46
CECONY [Member]
OPERATING ACTIVITIES
NET INCOME	831	827
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	705	664
Deferred income taxes	364	220
Rate case amortization and accruals	1	32
Common equity component of allowance for funds used during construction	(1)	(2)
Other non-cash items (net)	(72)	84
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	(39)	(197)
Materials and supplies, including fuel oil and gas in storage	(26)	12
Other receivables and other current assets	(27)	(41)
Prepayments	(347)	(308)
Accounts payable	(180)	50
Pensions and retiree benefits obligations	616	639
Pensions and retiree benefits contributions	(830)	(761)
Accrued taxes	(92)	40
Accrued interest	43	46
Superfund and environmental remediation costs (net)	(6)	7
Deferred charges, noncurrent assets and other regulatory assets	63	84
Deferred credits and other regulatory liabilities	302	88
Other liabilities	64	(21)
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,369	1,463
INVESTING ACTIVITIES
Utility construction expenditures	(1,614)	(1,368)
Cost of removal less salvage	(139)	(115)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,753)	(1,483)
FINANCING ACTIVITIES
Net proceeds of short-term debt	621	332
Preferred stock redemption		(239)
Issuance of long-term debt	700	400
Retirement of long-term debt	(700)	(300)
Debt issuance costs	(7)	(4)
Dividend to parent	(545)	(512)
Preferred stock dividends		(3)
NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	69	(326)
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	(315)	(346)
BALANCE AT BEGINNING OF PERIOD	353	372
BALANCE AT END OF PERIOD	38	26
Cash paid during the period for:
Interest	336	344
Income taxes	$ 117	$ 50