Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2020	Dec. 31, 2019
Early Plant Retirements/Asset Dispositions [Line Items]
Assets Held-for-sale		$ 29,000,000	$ 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		$ 29,000,000	$ 28,000,000
Approximate Loss on Disposition	$ 400,000,000