Early Plant Retirements/Asset Dispositions Early Plant Retirements/Asset Dispositions (Details) - USD ($)		1 Months Ended	3 Months Ended			9 Months Ended
		Oct. 31, 2021	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Early Plant Retirements/Asset Dispositions [Line Items]
Liabilities Held-for-Sale				$ 126,000,000		$ 126,000,000		$ 0
PSEG Power [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
ZEC Charge per kwh						0.004
ZEC Charge per MWh						10
Gain (Loss) on Disposition							$ 122,000,000
Severance Costs, Environmental Accruals and Other Adjustments						13,000,000
Assets Held for Sale				2,050,000,000		2,050,000,000
Liabilities Held-for-Sale				126,000,000		126,000,000		$ 0
Impairment of Long-Lived Assets to be Disposed of				2,162,000,000	$ 519,000,000	2,681,000,000
PSEG Power [Member] | Other Current Assets [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
Assets Held for Sale	[1]			264,000,000		264,000,000
PSEG Power [Member] | Property, Plant and Equipment
Early Plant Retirements/Asset Dispositions [Line Items]
Assets Held for Sale				1,749,000,000		1,749,000,000
PSEG Power [Member] | Other Noncurrent Assets [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
Assets Held for Sale				37,000,000		37,000,000
PSEG Power [Member] | Other Current Liabilities [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
Liabilities Held-for-Sale	[2]			49,000,000		49,000,000
PSEG Power [Member] | Other Noncurrent Liabilities [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
Liabilities Held-for-Sale	[3]			$ 77,000,000		77,000,000
PSEG Power [Member] | Subsequent Event [Member]
Early Plant Retirements/Asset Dispositions [Line Items]
Gain (Loss) on Extinguishment of Debt		$ 298,000,000
Proceeds from Divestiture of Businesses			$ 1,920,000,000
PSEG Power [Member] | 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

[1] Primarily includes Fuel, Materials and Supplies, Prepayments and Other Current Assets.

[2] Primarily includes Accounts Payable and Other Current Liabilities.

[3] Primarily includes AROs, Accrued Pension Costs and Other Noncurrent Liabilities