Organization and Basis of Presentation Organization and Basis of Presentation (Details) - USD ($) $ in Millions		Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Cash and Cash Equivalents		$ 1,603	$ 818
Cash, Cash Equivalents and Restricted Cash		1,642	863	$ 841	$ 572
Public Service Electric and Gas Company [Member]
Cash and Cash Equivalents		910	294
Restricted Cash in Other Current Assets		22	28
Restricted Cash in Other Noncurrent Assets		17	17
Cash, Cash Equivalents and Restricted Cash		949	339	$ 669	$ 233
Other Entities [Member]
Cash and Cash Equivalents	[1]	693	524
Restricted Cash in Other Current Assets	[1]	0	0
Restricted Cash in Other Noncurrent Assets	[1]	0	0
Cash, Cash Equivalents and Restricted Cash	[1]	693	524
Other Current Assets [Member]
Restricted Cash in Other Current Assets		22	28
Other Noncurrent Assets [Member]
Restricted Cash in Other Noncurrent Assets		$ 17	$ 17

[1] Includes amounts applicable to PSEG (parent company), PSEG Power, Energy Holdings and Services.