Organization, Basis of Presentation and Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Cash and Cash Equivalents		$ 203	$ 54
Restricted Cash in Other Current Assets		3	23
Restricted Cash in Other Noncurrent Assets		22	22
Cash, Cash Equivalents and Restricted Cash		228	99	$ 100	$ 511
Public Service Electric and Gas Company [Member]
Cash and Cash Equivalents		185	30
Restricted Cash in Other Current Assets		3	23
Restricted Cash in Other Noncurrent Assets		22	22
Cash, Cash Equivalents and Restricted Cash		210	75	$ 69	$ 266
PSEG Power & Other [Member]
Cash and Cash Equivalents	[1]	18	24
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]	$ 18	$ 24

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