Consolidated Statement Of Cash Flows (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES
Net Income	$ 483	$ 415
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	437	415
Deferred income taxes	181	46
Common equity component of allowance for funds used during construction	(6)	(9)
Net derivative (gains)/losses	(35)	(2)
Other non-cash items (net)	(9)	41
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	72	(28)
Materials and supplies, including fuel oil and gas in storage	38	27
Other receivables and other current assets	69	79
Prepayments	194
Accounts payable	(76)	(79)
Pensions and retiree benefits	(72)	49
Accrued taxes	66	(7)
Accrued interest		(3)
Deferred charges, deferred derivative losses, noncurrent assets and other regulatory assets	125	(319)
Deferred credits and other regulatory liabilities	140	111
Other assets		(7)
Other liabilities	(18)	66
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,589	795
INVESTING ACTIVITIES
Utility construction expenditures	(958)	(946)
Cost of removal less salvage	(81)	(66)
Non-utility construction expenditures	(50)	(4)
Proceeds from investment tax credits and grants related to renewable energy investments	4
Loan to Pilesgrove solar project	(50)
Common equity component of allowance for funds used during construction	6	9
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,129)	(1,007)
FINANCING ACTIVITIES
Net proceeds from short-term debt		153
Retirement of long-term debt	(3)	(426)
Issuance of long-term debt		700
Issuance of common stock	58	25
Repurchase of common stock	(9)
Debt issuance costs		(5)
Common stock dividends	(346)	(311)
Preferred stock dividends	(6)	(6)
NET CASH FLOWS (USED IN)/FROM FINANCING ACTIVITIES	(306)	130
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	154	(82)
BALANCE AT BEGINNING OF PERIOD	338	260
BALANCE AT END OF PERIOD	492	178
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	282	295
Income taxes	(155)	157
CECONY [Member]
OPERATING ACTIVITIES
Net Income	432	384
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	410	388
Deferred income taxes	146	56
Common equity component of allowance for funds used during construction	(5)	(8)
Other non-cash items (net)	66	16
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	74	(21)
Materials and supplies, including fuel oil and gas in storage	36	14
Other receivables and other current assets	207	58
Prepayments	9	2
Accounts payable	(56)	(75)
Pensions and retiree benefits	(109)	22
Accrued taxes	21	2
Accrued interest		(4)
Deferred charges, deferred derivative losses, noncurrent assets and other regulatory assets	65	(271)
Deferred credits and other regulatory liabilities	138	97
Other liabilities	(9)	77
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,425	737
INVESTING ACTIVITIES
Utility construction expenditures	(910)	(895)
Cost of removal less salvage	(78)	(65)
Common equity component of allowance for funds used during construction	5	8
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(983)	(952)
FINANCING ACTIVITIES
Net proceeds from short-term debt		66
Retirement of long-term debt		(325)
Issuance of long-term debt		700
Debt issuance costs		(5)
Capital contribution by parent		24
Common stock dividends	(340)	(335)
Preferred stock dividends	(6)	(6)
NET CASH FLOWS (USED IN)/FROM FINANCING ACTIVITIES	(346)	119
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	96	(96)
BALANCE AT BEGINNING OF PERIOD	78	131
BALANCE AT END OF PERIOD	174	35
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	253	265
Income taxes	$ (128)	$ 137