Organization, Basis Of Presentation And Summary Of Significant Accounting Policies Organization, Basic of Presentation And Summary Of Significant Accounting Policies (Cash, Cash Equivalents and Restricted Cash) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents		$ 177	$ 313
Restricted Cash and Investments, Noncurrent		14	2
Restricted Cash and Investments, Current		8	0
Cash, Cash Equivalents and Restricted Cash		199	315	$ 426	$ 395
PSE&G [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents		39	242
Restricted Cash and Investments, Noncurrent		14	2
Restricted Cash and Investments, Current		8	0
Cash, Cash Equivalents and Restricted Cash		61	244	393	199
Power [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents		22	32
Restricted Cash and Investments, Noncurrent		0	0
Restricted Cash and Investments, Current		0	0
Cash, Cash Equivalents and Restricted Cash		22	32	$ 11	$ 12
Other [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents	[1]	116	39
Restricted Cash and Investments, Noncurrent	[1]	0	0
Restricted Cash and Investments, Current	[1]	0	0
Cash, Cash Equivalents and Restricted Cash	[1]	$ 116	$ 39

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