Capitalization - Narrative (Details) - USD ($)	Oct. 31, 2024	Sep. 30, 2024	May 31, 2024
CECONY | Subsequent Event
Debt Instrument [Line Items]
Face amount of debt	$ 224,600,000
5.375 Percent Debentures, due 2034 | CECONY
Debt Instrument [Line Items]
Face amount of debt			$ 400,000,000
Interest rate (percent)			5.375%
5.70 Percent Debentures, due 2054 | CECONY
Debt Instrument [Line Items]
Face amount of debt			$ 1,000,000,000
Interest rate (percent)			5.70%
5.41 Percent Debentures, due 2054 | O&R
Debt Instrument [Line Items]
Face amount of debt		$ 125,000,000
Interest rate (percent)		5.41%