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Environmental Matters - Additional Information (Details) - Superfund Sites $ in Millions	12 Months Ended
	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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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