Asset Retirement Obligations (AROs) (Impact Of The Revisions On Asset Retirement Obligation) (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance				$ 1,212	$ 1,087
Liabilities Settled				(15)	(9)
Adjustments	[1]			(37)
Accretion Expense				44	42
Accretion Expense Deferred and Recovered in Rate Base	[2]			16	17
Revision to Present Value of Future Cash Flows				353	75
ARO Liability, Ending Balance		$ 1,573		1,573	1,212
Public Service Electric and Gas Company
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance				314	303
Liabilities Settled				(14)	(7)
Adjustments	[1]			0
Accretion Expense				0	0
Accretion Expense Deferred and Recovered in Rate Base	[2]			16	17
Revision to Present Value of Future Cash Flows				47	1
ARO Liability, Ending Balance		363		363	314
Other [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
ARO Liability, Beginning Balance				898	784
Liabilities Settled				(1)	(2)
Adjustments	[1]			(37)
Accretion Expense				44	42
Accretion Expense Deferred and Recovered in Rate Base	[2]			0	0
Revision to Present Value of Future Cash Flows		255	$ 51	306	74
ARO Liability, Ending Balance		$ 1,210		$ 1,210	$ 898

[1] Represents amounts related to the sale of the solar plants and the fossil generating assets classified as Held for Sale.

[2] Not reflected as expense in Consolidated Statements of Operations.