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Environmental Matters - Additional Information (Details) - Superfund Sites - Manufactured Gas Plant Sites - Maximum $ in Millions | Mar. 31, 2024 USD ($)
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Site Contingency [Line Items] |
Estimated aggregate undiscounted potential liability related environmental contaminants (up to) | $ 3,440,000
CECONY |
Site Contingency [Line Items] |
Estimated aggregate undiscounted potential liability related environmental contaminants (up to) | $ 3,295,000

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