Goodwill And Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2018
Goodwill [Line Items]
Intangible Assets	$ 149	$ 158
PSEG Power LLC
Goodwill [Line Items]
Goodwill, Impairment Loss	16
Intangible Assets	$ 149	$ 158	$ 143

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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