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Environmental Matters - Additional Information (Details) - Superfund Sites - Manufactured Gas Plant Sites - Maximum
$ in Millions
Jun. 30, 2024
USD ($)
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