Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Early Plant Retirements Early Plant Retirements (Details) - PSEG Power LLC - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
ZEC Charge per kwh		$ 0.004
ZEC Charge per MWh		10
Gain (Loss) on Asset Disposition	$ (400,000,000)	122,000,000	$ (54,000,000)
Other Production-Solar [Member]
Restructuring Cost and Reserve [Line Items]
Carrying value of assets		560,000,000
Fossil Production [Member]
Restructuring Cost and Reserve [Line Items]
Carrying value of assets		$ 4,500,000,000