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Environmental Matters - Additional Information (Details) - Superfund Sites $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($)
Site Contingency [Line Items] |
Remediation cost estimate | $ 62
Manufactured Gas Plant Sites | Maximum |
Site Contingency [Line Items] |
Estimated aggregate undiscounted potential liability related environmental contaminants (up to) | 3,295
CECONY |
Site Contingency [Line Items] |
Remediation cost estimate | 60
CECONY | Manufactured Gas Plant Sites | Maximum |
Site Contingency [Line Items] |
Estimated aggregate undiscounted potential liability related environmental contaminants (up to) | $ 3,440

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