Income Taxes (Deferred Income Tax) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	$ 339	$ 390
OPEB	58	74
Deferred Tax Asset, CAMT	44	0
Deferred Tax Asset, Bad Debt	57	66
Deferred Tax Asset, Operating Leases	42	42
Other	129	379
Total Noncurrent Assets	669	951
Plant-Related Items	4,850	4,663
New Jersey Corporate Business Tax	1,284	1,009
Leasing Activities	35	99
Pension Costs	189	164
Deferred Tax Liabilities, Operating Leases	38	37
AROs and NDT Fund	250	161
Taxes Recoverable Through Future Rate (net)	201	149
Deferred Tax Liabilities, Other	430	324
Total Noncurrent Liabilities	7,277	6,606
Net Deferred Income Tax Liabilities	6,608	5,655
Accumulated Deferred Investment Tax Credit	63	70
Net Total Noncurrent Deferred Income Taxes and ITC	6,671	5,725
Public Service Electric and Gas Company
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	339	390
OPEB	28	42
Deferred Tax Asset, CAMT	106	0
Deferred Tax Asset, Bad Debt	57	66
Deferred Tax Asset, Operating Leases	22	19
Other	60	56
Total Noncurrent Assets	612	573
Plant-Related Items	4,396	4,174
New Jersey Corporate Business Tax	1,160	1,011
Conservation Costs	88	81
Pension Costs	198	195
Deferred Tax Liabilities, Operating Leases	21	18
Taxes Recoverable Through Future Rate (net)	201	149
Deferred Tax Liabilities, Other	297	223
Total Noncurrent Liabilities	6,361	5,851
Net Deferred Income Tax Liabilities	5,749	5,278
Accumulated Deferred Investment Tax Credit	64	70
Net Total Noncurrent Deferred Income Taxes and ITC	$ 5,813	$ 5,348