Schedule Of Consolidated Capital Stock (Consolidated Capital Stock) (Details) - USD ($) $ / shares in Units, $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Common Stock, authorized		1,000,000,000	1,000,000,000
Common Stock, Shares, outstanding		504,000,000	504,000,000	[1]
Common Stock, Value, Outstanding	[1]	$ 4,170	$ 4,172
Common Stock		$ 5,031	$ 5,003
Public Service Electric and Gas Company
Class of Stock [Line Items]
Common Stock, authorized		150,000,000	150,000,000
Common Stock		$ 892	$ 892
Public Service Electric and Gas Company | Preferred Stock [Member]
Class of Stock [Line Items]
Common Stock, authorized		7,500,000
Preferred stock, par value		$ 100
Public Service Electric and Gas Company | Cumulative Preferred Stock [Member]
Class of Stock [Line Items]
Common Stock, authorized		10,000,000
Preferred stock, par value		$ 25

[1] PSEG did not issue any new shares under the Dividend Reinvestment and Stock Purchase Plan or the Employee Stock Purchase Plan (ESPP) in 2020 or 2019.