Regulatory Matters - Rate Plans (Details) - USD ($) $ in Millions	1 Months Ended
	Oct. 31, 2021	Sep. 30, 2021	May 31, 2021
O&R | Electric and Gas Transmission Projects | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Rate proposal, period of rate plans	3 years
Recovery of late payment charges, period	3 years
Recovery of late payment charges, amount	$ 2.8
Recovery of late payment charges, return on equity threshold rate	0.05%
RECO | NJBPU | Electric | Subsidiaries
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount			$ 16.9
Return on common equity (percent)			1000.00%
Common equity ratio (percent)			4925.00%
RECO | NJBPU | Electric | Subsidiaries | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 19.5
Return on common equity (percent)	10.00%
Common equity ratio (percent)	4884.00%
RECO | NJBPU | Electric | Deferred storm costs | Subsidiaries
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 3.7	$ 1.0