Regulatory Matters - RECO Narrative (Details) - USD ($) $ in Thousands				1 Months Ended
	Aug. 30, 2022	Jan. 01, 2022	Dec. 31, 2021	Jan. 31, 2024	Dec. 31, 2022	Dec. 31, 2023
RECO
Public Utilities, General Disclosures [Line Items]
Deferred costs						$ 4,800
RECO | New Jersey Board of Public Utilities
Public Utilities, General Disclosures [Line Items]
Investment plan					$ 47,800
Investment plan, term (in years)					5 years
CECONY
Public Utilities, General Disclosures [Line Items]
Deferred costs						$ 3,000
CECONY | Infrastructure Investment and Jobs Act (IIJA) | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Investment plan				$ 100,000
O&R And RECO | Infrastructure Investment and Jobs Act (IIJA) | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Investment plan				100,000
CECONY, O&R And RECO | Infrastructure Investment and Jobs Act (IIJA) | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Investment plan				$ 60,000
Electric | RECO
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 18,200		$ 16,900
Electric | RECO | New Jersey Board of Public Utilities
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 9,650