Environmental Matters (Tables)

12 Months Ended

Dec. 31, 2018

Environmental Remediation Obligations [Abstract]

Accrued Liabilities and Regulatory Assets

The accrued liabilities and regulatory assets related to Superfund Sites at December 31, 2018 and 2017 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2018	2017	2018	2017
Accrued Liabilities:
Manufactured gas plant sites	$689	$651	$603	$551
Other Superfund Sites	90	86	90	86
Total	$779	$737	$693	$637
Regulatory assets	$810	$793	$716	$677

Environmental Remediation Costs

Environmental remediation costs incurred related to Superfund Sites at December 31, 2018 and 2017 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2018	2017	2018	2017
Remediation costs incurred	$25	$24	$18	$19

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, 2018 and 2017 were as follows:

	Con Edison		CECONY
(Millions of Dollars)	2018	2017	2018	2017
Accrued liability – asbestos suits	$8	$8	$7	$7
Regulatory assets – asbestos suits	$8	$8	$7	$7
Accrued liability – workers’ compensation	$79	$84	$75	$80
Regulatory assets – workers’ compensation	$5	$10	$5	$10