Debt and Credit Facilities (Changes in Long-Term Debt) (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 1,750	$ 900
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	500	$ 900
Medium Term Notes Green Bond Three Point One Zero due Two Thousand Thirty Two \| Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 500
Debt Instrument, Interest Rate, Stated Percentage	3.10%
Three Year Variable rate term loan \| PSEG Power [Member]
Debt Instrument [Line Items]
Issuance of Long-term Debt	$ 1,250

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

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