Environmental Matters (Tables)

12 Months Ended

Dec. 31, 2020

Environmental Remediation Obligations [Abstract]

Accrued Liabilities and Regulatory Assets

The accrued liabilities and regulatory assets related to Superfund Sites at December 31, 2020 and 2019 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2020	2019	2020	2019
Accrued Liabilities:
Manufactured gas plant sites	$752	$640	$676	$561
Other Superfund Sites	105	94	104	93
Total	$857	$734	$780	$654
Regulatory assets	$865	$732	$791	$647

Environmental Remediation Costs

Environmental remediation costs incurred related to Superfund Sites at December 31, 2020 and 2019 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2020	2019	2020	2019
Remediation costs incurred	$33	$19	$32	$13

Accrued Liability for Asbestos Suits and Workers' Compensation Proceedings

The accrued liability for asbestos suits and workers’ compensation proceedings (including those related to asbestos exposure) and the amounts deferred as regulatory assets for the Companies at December 31, 2020 and 2019 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2020	2019	2020	2019
Accrued liability – asbestos suits	$8	$8	$7	$7
Regulatory assets – asbestos suits	$8	$8	$7	$7
Accrued liability – workers’ compensation	$72	$78	$68	$73
Regulatory assets/(liabilities) – workers’ compensation	$(3)	$3	$(3)	$3