Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Early Plant Retirements/Asset Dispositions [Line Items]
Loss on Asset Dispositions	$ 7,000,000		$ 0	$ 402,000,000	$ 0
PSEG Power [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
ZEC Charge per kwh				0.004
ZEC Charge per MWh				10
Loss on Asset Dispositions	$ 7,000,000	$ 400,000,000		$ 402,000,000	$ 0