Rate Filings (Details) - PSE And G [Member] - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2019	Mar. 31, 2019
Gas Weather Normalization Deferral [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 14
2016 to 2017 [Member] | Gas Weather Normalization Deferral [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		23
2017 to 2018 [Member] | Gas Weather Normalization Deferral [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Approved Rate Increase (Decrease), Amount		$ (9)
Subsequent Event [Member] | Gas System Modernization Program [Member]
Regulatory Assets And Liabilities [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 12