Environmental Matters (Tables)

12 Months Ended

Dec. 31, 2022

Environmental Remediation Obligations [Abstract]

Accrued Liabilities and Regulatory Assets

The accrued liabilities and regulatory assets related to Superfund Sites at December 31, 2022 and 2021 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2022	2021	2022	2021
Accrued Liabilities:
Manufactured gas plant sites	$876	$845	$782	$755
Other Superfund Sites	121	95	121	95
Total	$997	$940	$903	$850
Regulatory assets	$991	$938	$906	$860

Environmental Remediation Costs

Environmental remediation costs incurred related to Superfund Sites at December 31, 2022 and 2021 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2022	2021	2022	2021
Remediation costs incurred	$21	$25	$20	$24

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 or liabilities for the Companies at December 31, 2022 and 2021 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2022	2021	2022	2021
Accrued liability – asbestos suits	$8	$8	$7	$7
Regulatory assets – asbestos suits	8	8	7	7
Accrued liability – workers’ compensation	61	65	59	62
Regulatory liabilities – workers’ compensation	11	8	11	8