Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019
Early Plant Retirements/Asset Dispositions [Line Items]
Assets Held-for-sale	$ 0		$ 0	$ 30,000,000
PSEG Power [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
ZEC Charge per kwh			0.004
ZEC Charge per MWh			10
Assets Held-for-sale	0		$ 0	$ 28,000,000
Gain (Loss) on Disposition	$ 122,000,000	$ (400,000,000)