Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Total Amount of Unrecognized Tax Benefits at January	$ 192	$ 147	$ 321
Increases as a Result of Positions Taken in a Prior Period	9	58	33
Decreases as a Result of Positions Taken in a Prior Period	(40)	(19)	(91)
Increases as a Result of Positions Taken during the Current Period	1	6	0
Decreases as a Result of Positions Taken during the Current Period	0	0	0
Decreases as a Result of Settlements with Taxing Authorities	(28)	0	(116)
Decreases due to Lapses of Applicable Statute of Limitations	(4)	0	0
Total Amount of Unrecognized Tax Benefits at December	130	192	147
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits	(37)	(76)	(69)
Regulatory Asset-Unrecognized Tax Benefits	(8)	(7)	(15)
Amount of unrecognized tax benefits that would affect the effective tax rate	85	109	63
Public Service Electric and Gas Company
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Total Amount of Unrecognized Tax Benefits at January	27	30	124
Increases as a Result of Positions Taken in a Prior Period	2	8	21
Decreases as a Result of Positions Taken in a Prior Period	(2)	(12)	(51)
Increases as a Result of Positions Taken during the Current Period	1	1	0
Decreases as a Result of Positions Taken during the Current Period	0	0	0
Decreases as a Result of Settlements with Taxing Authorities	0	0	(64)
Decreases due to Lapses of Applicable Statute of Limitations		0	0
Increases due to Lapses of Applicable Statute of Limitations	1
Total Amount of Unrecognized Tax Benefits at December	29	27	30
Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits	(15)	(15)	(12)
Regulatory Asset-Unrecognized Tax Benefits	(8)	(7)	(15)
Amount of unrecognized tax benefits that would affect the effective tax rate	$ 6	$ 5	$ 3