Organization, Basis of Presentation and Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions		Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Cash and Cash Equivalents		$ 186	$ 125
Restricted Cash in Other Current Assets		8	8
Restricted Cash in Other Noncurrent Assets		21	21
Cash, Cash Equivalents and Restricted Cash		215	154	$ 145	$ 99
Public Service Electric and Gas Company [Member]
Cash and Cash Equivalents		64	79
Restricted Cash in Other Current Assets		6	8
Restricted Cash in Other Noncurrent Assets		21	21
Cash, Cash Equivalents and Restricted Cash		91	108	$ 47	$ 75
PSEG Power & Other [Member]
Cash and Cash Equivalents	[1]	122	46
Restricted Cash in Other Current Assets	[1]	2	0
Restricted Cash in Other Noncurrent Assets	[1]	0	0
Cash, Cash Equivalents and Restricted Cash	[1]	$ 124	$ 46

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