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Amount of public utility's requested rate increase (decrease) with regulatory agency.

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The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

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Rate Filings (Details) $ in Millions	1 Months Ended	3 Months Ended
Rate Filings (Details) $ in Millions	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		$ 3,832	$ 3,872
Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Proposed BGSS rate per therm		0.32
Regulatory Assets		$ 3,832	$ 3,872
Public Service Electric and Gas Company [Member] \| COVID-19 Deferral - Bad Debt portion
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		35
Public Service Electric and Gas Company [Member] \| Gas System Modernization Program II [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		21
COVID-19 deferrals [Member] \| Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		$ 60
Subsequent Event [Member] \| Public Service Electric and Gas Company [Member] \| Energy Strong II
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 13