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Environmental Matters (Tables)
 12 Months Ended
Dec. 31, 2024
Environmental Remediation Obligations [Abstract]  
Accrued Liabilities and Regulatory Assets
The accrued liabilities and regulatory assets related to Superfund Sites at December 31, 2024 and 2023 were as follows:
                    Con Edison                CECONY
(Millions of Dollars)2024202320242023
Accrued Liabilities:
Manufactured gas plant sites$941$1,016$846$924
Other Superfund Sites9610296102
Total$1,037$1,118$942$1,026
Regulatory assets$1,038$1,105$952$1,022
Environmental Remediation Costs
Environmental remediation costs incurred related to Superfund Sites at December 31, 2024 and 2023 were as follows:
                   Con Edison                 CECONY
(Millions of Dollars)2024202320242023
Remediation costs incurred$44$13$44$12
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, 2024 and 2023 were as follows:
                  Con Edison               CECONY
(Millions of Dollars)2024202320242023
Accrued liability – asbestos suits$8$8$7$7
Regulatory assets – asbestos suits8877
Accrued liability – workers’ compensation53565154
Regulatory liabilities – workers’ compensation20172017