Income Taxes (Schedule Of Effective Tax Rates) (Detail)	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Income Taxes [Line Items]
Effective tax rate	15.30%	8.90%
Public Service Electric and Gas Company [Member]
Income Taxes [Line Items]
Effective tax rate	14.20%	19.90%
PSEG Power [Member]
Income Taxes [Line Items]
Effective tax rate	24.40%	122.80%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration