Environmental Matters (Tables)

12 Months Ended

Dec. 31, 2023

Environmental Remediation Obligations [Abstract]

Accrued Liabilities and Regulatory Assets

The accrued liabilities and regulatory assets related to Superfund Sites at December 31, 2023 and 2022 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2023	2022	2023	2022
Accrued Liabilities:
Manufactured gas plant sites	$1,016	$876	$924	$782
Other Superfund Sites	102	121	102	121
Total	$1,118	$997	$1,026	$903
Regulatory assets	$1,105	$991	$1,022	$906

Environmental Remediation Costs

Environmental remediation costs incurred related to Superfund Sites at December 31, 2023 and 2022 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2023	2022	2023	2022
Remediation costs incurred	$13	$21	$12	$20

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, 2023 and 2022 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2023	2022	2023	2022
Accrued liability – asbestos suits	$8	$8	$7	$7
Regulatory assets – asbestos suits	8	8	7	7
Accrued liability – workers’ compensation	56	61	54	59
Regulatory liabilities – workers’ compensation	17	11	17	11