Income Taxes (Deferred Income Tax) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	$ 390	$ 439
OPEB	74	107
Deferred Tax Asset, Bad Debt	66	67
Deferred Tax Asset, Uncertain Tax Positions	1	30
Deferred Tax Asset, Operating Leases	42	48
Other	378	253
Total Noncurrent Assets	951	944
Plant-Related Items	4,663	4,701
New Jersey Corporate Business Tax	1,009	939
Leasing Activities	99	113
Pension Costs	164	169
Deferred Tax Liabilities, Operating Leases	37	43
AROs and NDT Fund	161	270
Taxes Recoverable Through Future Rate (net)	149	120
Deferred Tax Liabilities, Other	324	271
Total Noncurrent Liabilities	6,606	6,626
Net Noncurrent Deferred Income Tax Liabilities	5,655	5,682
Accumulated Deferred Investment Tax Credit	70	77
Net Total Noncurrent Deferred Income Taxes and ITC	5,725	5,759
Public Service Electric and Gas Company
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	390	439
OPEB	42	61
Deferred Tax Asset, Bad Debt	66	67
Deferred Tax Asset, Uncertain Tax Positions	3	0
Deferred Tax Asset, Operating Leases	19	20
Other	53	57
Total Noncurrent Assets	573	644
Plant-Related Items	4,174	4,006
New Jersey Corporate Business Tax	1,011	863
Conservation Costs	81	75
Pension Costs	195	180
Deferred Tax Liabilities, Operating Leases	18	19
Deferred Tax Liabilities, Uncertain Tax Positions	0	1
Taxes Recoverable Through Future Rate (net)	149	120
Deferred Tax Liabilities, Other	223	178
Total Noncurrent Liabilities	5,851	5,442
Net Noncurrent Deferred Income Tax Liabilities	5,278	4,798
Accumulated Deferred Investment Tax Credit	70	76
Net Total Noncurrent Deferred Income Taxes and ITC	$ 5,348	$ 4,874