Goodwill And Other Intangibles (Schedule of Intangibles) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Purchases of Intangible Assets	$ 111	$ 98	$ 146
Intangible Assets	158	149
PSEG Power LLC
Goodwill [Line Items]
Retirement of Intangibles	(102)	(89)
Purchases of Intangible Assets	111	98	146
Sales and Transfers of Intangible Assets		(3)
Intangible Assets	158	149	143
Renewable Energy Credits [Member] | PSEG Power LLC
Goodwill [Line Items]
Retirement of Intangibles	(93)	(83)
Purchases of Intangible Assets	94	72
Sales and Transfers of Intangible Assets		(3)
Intangible Assets	46	45	59
Emissions Allowances [Member] | PSEG Power LLC
Goodwill [Line Items]
Retirement of Intangibles	(9)	(6)
Purchases of Intangible Assets	17	26
Sales and Transfers of Intangible Assets		0
Intangible Assets	$ 112	$ 104	$ 84