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Environmental Matters (Tables) | 9 Months Ended
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Sep. 30, 2025
Environmental Remediation Obligations [Abstract] |
Schedule of Accrued Liabilities and Regulatory Assets | The accrued liabilities and regulatory assets related to Superfund Sites at September 30, 2025 and December 31, 2024 were as follows:
| Con Edison | CECONY
(Millions of Dollars) | 2025 | 2024 | 2025 | 2024
Accrued Liabilities: |  |  |  |
Manufactured gas plant sites | $939 | $941 | $845 | $846
Other Superfund Sites | 90 | 96 | 90 | 96
Total | $1,029 | $1,037 | $935 | $942
Regulatory assets | $1,024 | $1,038 | $937 | $952
Schedule of Environmental Remediation Costs | Environm ental investigation and remediation costs incurred related to Superfund Sites for the three and nine months ended September 30, 2025 and 2024 were as follows:
| For the Three Months Ended September 30,
| Con Edison | CECONY
(Millions of Dollars) | 2025 | 2024 | 2025 | 2024
Investigation and remediation costs incurred | $— | $12 | $— | $12
| For the Nine Months Ended September 30,
| Con Edison | CECONY
(Millions of Dollars) | 2025 | 2024 | 2025 | 2024
Investigation and remediation costs incurred | $12 | $27 | $11 | $27
Schedule of 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 September 30, 2025 and December 31, 2024 were as follows:
| Con Edison | CECONY
(Millions of Dollars) | 2025 | 2024 | 2025 | 2024
Accrued liability – asbestos suits | $8 | $8 | $7 | $7
Regulatory assets – asbestos suits | 8 | 8 | 7 | 7
Accrued liability – workers’ compensation | 52 | 53 | 49 | 51
Regulatory liabilities – workers’ compensation | 21 | 20 | 21 | 20

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