Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - PSEG Power [Member]	6 Months Ended
	Jun. 30, 2021 USD ($)
Early Plant Retirements/Asset Dispositions [Line Items]
ZEC Charge per kwh	$ 0.004
ZEC Charge per MWh	10
Impairment of Long-Lived Assets Held-for-use	519,000,000
Other Production-Solar
Early Plant Retirements/Asset Dispositions [Line Items]
Gain (Loss) on Disposition	62,000,000
Disposal group, gain (loss) on sale tax impact	63,000,000
Deferred ITC previously recognized	185,000,000
Fossil Fuel Plant
Early Plant Retirements/Asset Dispositions [Line Items]
Estimated impairment and related costs	$ 2,500,000,000