Environmental Matters (Tables)

9 Months Ended

Sep. 30, 2011

Environmental Matters [Abstract]

Accrued Liabilities And Regulatory Assets

	Con Edison				CECONY
(Millions of Dollars)	2011		2010		2011		2010
Accrued Liabilities:
Manufactured gas plant sites	$	432	$	446	$	314	$	327
Other Superfund Sites		64		66		63		65
Total	$	496	$	512	$	377	$	392
Regulatory assets	$	681	$	695	$	563	$	574

Environmental Remediation Costs

	For the Three Months Ended September 30,
	Con Edison				CECONY
(Millions of Dollars)	2011		2010		2011		2010
Remediation costs incurred	$	9	$	9	$	9	$	8
	For the Nine Months Ended September 30,
	Con Edison				CECONY
(Millions of Dollars)	2011		2010		2011		2010
Remediation costs incurred	$	24	$	32	$	22	$	30

Accrued Liabilities For Asbestos Suits And Workers' Compensation Proceedings

	Con Edison				CECONY
(Millions of Dollars)	2011		2010		2011		2010
Accrued liability – asbestos suits	$	10	$	10	$	10	$	10
Regulatory assets – asbestos suits	$	10	$	10	$	10	$	10
Accrued liability – workers' compensation	$	99	$	106	$	94	$	101
Regulatory assets – workers' compensation	$	25	$	31	$	24	$	31