CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
OPERATING ACTIVITIES
Net Income	$ 494	$ 483
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	469	437
Deferred income taxes	146	181
Rate case amortization and accruals	22	29
Common equity component of allowance for funds used during construction	(2)	(6)
Net derivative gains	(31)	(35)
Other non-cash items (net)	(85)	(38)
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	89	72
Materials and supplies, including fuel oil and gas in storage	19	38
Other receivables and other current assets	17	69
Prepayments	(6)	194
Accounts payable	(89)	(76)
Pensions and retiree benefits obligations	483	430
Pensions and retiree benefits contributions	(450)	(502)
Accrued taxes	(34)	66
Accrued interest	19
Superfund and environmental remediation costs (net)	1
Deferred charges, noncurrent assets and other regulatory assets	116	125
Deferred credits and other regulatory liabilities	73	140
Other liabilities	(4)	(18)
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,247	1,589
INVESTING ACTIVITIES
Utility construction expenditures	(1,030)	(952)
Cost of removal less salvage	(85)	(81)
Non-utility construction expenditures	(43)	(50)
Proceeds from investment tax credits and grants related to renewable energy investments	25	4
Net investment in Pilesgrove solar project and other	28
Loan to affiliate		(50)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,105)	(1,129)
FINANCING ACTIVITIES
Net proceeds from short-term debt	800
Preferred stock redemption	(239)
Retirement of long-term debt	(2)	(3)
Issuance of long-term debt	400
Issuance of common shares for stock plans, net of repurchases	(12)	49
Debt issuance costs	(4)
Common stock dividends	(349)	(346)
Preferred stock dividends	(3)	(6)
NET CASH FLOWS FROM/(USED IN) FINANCING ACTIVITIES	591	(306)
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	733	154
BALANCE AT BEGINNING OF PERIOD	648	338
BALANCE AT END OF PERIOD	1,381	492
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	281	282
Income taxes	45	(155)
CECONY
OPERATING ACTIVITIES
Net Income	439	432
PRINCIPAL NON-CASH CHARGES/(CREDITS) TO INCOME
Depreciation and amortization	439	410
Deferred income taxes	106	146
Rate case amortization and accruals	22	29
Common equity component of allowance for funds used during construction	(1)	(5)
Other non-cash items (net)	(37)	37
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable - customers, less allowance for uncollectibles	63	74
Materials and supplies, including fuel oil and gas in storage	18	36
Other receivables and other current assets	(8)	207
Prepayments	5	9
Accounts payable	(57)	(56)
Pensions and retiree benefits obligations	422	393
Pensions and retiree benefits contributions	(450)	(502)
Accrued taxes	(3)	21
Accrued interest	7
Superfund and environmental remediation costs (net)	(1)
Deferred charges, noncurrent assets and other regulatory assets	59	65
Deferred credits and other regulatory liabilities	70	138
Other liabilities	12	(9)
NET CASH FLOWS FROM OPERATING ACTIVITIES	1,105	1,425
INVESTING ACTIVITIES
Utility construction expenditures	(974)	(905)
Cost of removal less salvage	(83)	(78)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(1,057)	(983)
FINANCING ACTIVITIES
Net proceeds from short-term debt	800
Preferred stock redemption	(239)
Issuance of long-term debt	400
Debt issuance costs	(4)
Dividend to parent	(341)	(340)
Preferred stock dividends	(3)	(6)
NET CASH FLOWS FROM/(USED IN) FINANCING ACTIVITIES	613	(346)
CASH AND TEMPORARY CASH INVESTMENTS:
NET CHANGE FOR THE PERIOD	661	96
BALANCE AT BEGINNING OF PERIOD	372	78
BALANCE AT END OF PERIOD	1,033	174
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	252	253
Income taxes	$ 45	$ (128)