Income Taxes (Deferred Income Tax) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	$ 439	$ 485
OPEB	107	135
Deferred Tax Asset, Bad Debt	67	40
Related to Uncertain Tax Positions	30	29
Deferred Tax Asset, Interest Carryforward	0	39
Deferred Tax Asset, Operating Leases	48	60
Other	253	130
Total Noncurrent Assets	944	918
Plant-Related Items	4,701	5,163
New Jersey Corporate Business Tax	939	1,016
Leasing Activities	113	133
Pension Costs	169	97
Deferred Tax Liabilities, Operating Leases	43	55
AROs and NDT Fund	270	324
Taxes Recoverable Through Future Rate (net)	120	114
Deferred Tax Liabilities, Other	271	247
Total Noncurrent Liabilities	6,626	7,149
Accumulated Deferred Investment Tax Credit	77	271
Net Total Noncurrent Deferred Income Taxes and ITC	5,759	6,502
Deferred Tax Liabilities, Net, Noncurrent	5,682	6,231
Public Service Electric and Gas Company
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	439	485
OPEB	61	82
Deferred Tax Asset, Bad Debt	67	40
Deferred Tax Asset, Operating Leases	20	21
Other	57	52
Total Noncurrent Assets	644	680
Plant-Related Items	4,006	3,874
New Jersey Corporate Business Tax	863	721
Conservation Costs	75	61
Pension Costs	180	166
Deferred Tax Liabilities, Operating Leases	19	21
Deferred Tax Liabilities, Uncertain Tax Positions	1	5
Taxes Recoverable Through Future Rate (net)	120	114
Deferred Tax Liabilities, Other	178	161
Total Noncurrent Liabilities	5,442	5,123
Accumulated Deferred Investment Tax Credit	76	81
Net Total Noncurrent Deferred Income Taxes and ITC	4,874	4,524
Deferred Tax Liabilities, Net, Noncurrent	$ 4,798	$ 4,443