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Proposed BGSS rate per therm

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Percentage of public utility's approved return on equity.

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+ References

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	9 Months Ended
Rate Filings (Details) $ in Millions	Jan. 01, 2022 USD ($)	Sep. 30, 2021 USD ($)	Nov. 30, 2021	Oct. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Aug. 31, 2021 USD ($)	Jul. 31, 2021	Jun. 30, 2021 USD ($)	May 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Nov. 01, 2021	Dec. 31, 2020 USD ($)
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		$ 3,983.0			$ 3,983.0							$ 3,983.0		$ 3,872.0
Regulatory Assets		272.0			272.0							272.0		369.0
Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		3,983.0			3,983.0							3,983.0		3,872.0
Regulatory Assets		272.0			272.0							272.0		$ 369.0
Public Service Electric and Gas Company [Member] \| Gas Weather Normalization Deferral [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount					(2.0)
Public Service Electric and Gas Company [Member] \| ZEC Liability
Regulatory Assets And Liabilities [Line Items]
ZEC purchases												157.0
Public Service Electric and Gas Company [Member] \| COVID-19 Deferral - Bad Debt portion
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		49.0			49.0							49.0
Public Service Electric and Gas Company [Member] \| Gas System Modernization Program II [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount									$ 21.0
Public Utilities, Requested Rate Increase (Decrease), Amount					28.0
Public Service Electric and Gas Company [Member] \| Energy Strong II
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount										$ 13.0
Public Service Electric and Gas Company [Member] \| Electric Green Program Recovery [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 2.0
Public Service Electric and Gas Company [Member] \| Gas Green Program Recovery [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount								2.0
Public Service Electric and Gas Company [Member] \| Remediation Adjustment Charge [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount											$ 35.0
Public Service Electric and Gas Company [Member] \| Transmission Formula Rate [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		(21.0)
Public Utilities, Approved Return on Equity, Percentage							11.18%
Public Utilities, Requested Return on Equity, Percentage						9.90%
Public Service Electric and Gas Company [Member] \| Formula Rate True up
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount								$ 13.0
Public Service Electric and Gas Company [Member] \| Community Solar Energy Pilot
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount									$ 0.4
Public Service Electric and Gas Company [Member] \| Basic Gas Supply Service
Regulatory Assets And Liabilities [Line Items]
Proposed BGSS rate per therm								0.32
Approved BGSS rate per therm											0.32
COVID-19 deferrals [Member] \| Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		95.0			95.0							95.0
Tax Adjustment Credits Electric Distribution [Member] \| Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount						$ (22.0)
Tax Adjustment Credits Gas Distribution [Member] \| Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount						$ (57.0)
Electric Bad Debt Deferral \| Public Service Electric and Gas Company [Member] \| Societal Benefits Charges Sbc
Regulatory Assets And Liabilities [Line Items]
Regulatory Assets		$ 112.0			$ 112.0							$ 112.0
Subsequent Event [Member] \| Public Service Electric and Gas Company [Member] \| ZEC Liability
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ (4.0)
Subsequent Event [Member] \| Public Service Electric and Gas Company [Member] \| Transmission Formula Rate [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ (150.0)
Subsequent Event [Member] \| Public Service Electric and Gas Company [Member] \| Basic Gas Supply Service
Regulatory Assets And Liabilities [Line Items]
Proposed BGSS rate per therm													0.36
Public Utilities, Requested Rate Increase (Decrease), Percentage			5.00%
Subsequent Event [Member] \| Tax Adjustment Credits Electric Distribution [Member] \| Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				(15.0)
Subsequent Event [Member] \| Tax Adjustment Credits Gas Distribution [Member] \| Public Service Electric and Gas Company [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ (31.0)