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Environmental Matters (Tables) | 9 Months Ended
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Sep. 30, 2023
Environmental Remediation Obligations [Abstract] |
Accrued Liabilities and Regulatory Assets | The accrued liabilities and regulatory assets related to Superfund Sites at September 30, 2023 and December 31, 2022 were as follows:
| Con Edison | CECONY
(Millions of Dollars) | 2023 | 2022 | 2023 | 2022
Accrued Liabilities: |  |  |  |
Manufactured gas plant sites | $874 | $876 | $780 | $782
Other Superfund Sites | 122 | 121 | 121 | 121
Total | $996 | $997 | $901 | $903
Regulatory assets | $983 | $991 | $899 | $906
Environmental Remediation Costs | Environmental remediation costs incurred related to Superfund Sites for the three and nine months ended September 30, 2023 and 2022 were as follows:
| For the Three Months Ended September 30,
| Con Edison | CECONY
(Millions of Dollars) | 2023 | 2022 | 2023 | 2022
Remediation costs incurred | $1 | $3 | $1 | $3
| For the Nine Months Ended September 30,
| Con Edison | CECONY
(Millions of Dollars) | 2023 | 2022 | 2023 | 2022
Remediation costs incurred | $8 | $17 | $8 | $16
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, 2023 and December 31, 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 | $57 | $61 | $55 | $59
Regulatory liabilities – workers’ compensation | $12 | $11 | $15 | $11

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