Organization and Basis of Presentation Organization and Basis of Presentation (Details) - USD ($) $ in Millions		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Cash and Cash Equivalents		$ 82	$ 177
Cash, Cash Equivalents and Restricted Cash		115	199	$ 111	$ 315
Public Service Electric and Gas Company [Member]
Cash and Cash Equivalents		23	39
Restricted Cash in Other Current Assets		16	8
Restricted Cash in Other Noncurrent Assets		17	14
Cash, Cash Equivalents and Restricted Cash		56	61	36	244
PSEG Power [Member]
Cash and Cash Equivalents		14	22
Restricted Cash in Other Current Assets		0	0
Restricted Cash in Other Noncurrent Assets		0	0
Cash, Cash Equivalents and Restricted Cash		14	22	$ 20	$ 32
Other Entities [Member]
Cash and Cash Equivalents	[1]	45	116
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]	45	116
Other Current Assets [Member]
Restricted Cash in Other Current Assets		16	8
Other Noncurrent Assets [Member]
Restricted Cash in Other Noncurrent Assets		$ 17	$ 14

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