Goodwill And Other Intangibles (Schedule of Intangibles) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Purchases of Intangible Assets	$ 98	$ 146	$ 117
Intangible Assets	149	143
PSEG Power LLC
Goodwill [Line Items]
Retirement of Intangibles	(89)	(116)
Purchases of Intangible Assets	98	146	117
Sales and Transfers of Intangible Assets	(3)	(1)
Intangible Assets	149	143	114
Renewable Energy Credits [Member] | PSEG Power LLC
Goodwill [Line Items]
Retirement of Intangibles	(83)	(90)
Purchases of Intangible Assets	72	110
Sales and Transfers of Intangible Assets	(3)	(1)
Intangible Assets	45	59	40
Emissions Allowances [Member] | PSEG Power LLC
Goodwill [Line Items]
Retirement of Intangibles	(6)	(26)
Purchases of Intangible Assets	26	36
Sales and Transfers of Intangible Assets	0	0
Intangible Assets	$ 104	$ 84	$ 74