Income Taxes (Deferred Income Tax) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	$ 606	$ 602
OPEB	163	217
Related to Uncertain Tax Positions	71	142
Total Noncurrent Assets	840	961
Plant-Related Items	4,817	4,257
New Jersey Corporate Business Tax	756	674
Leasing Activities	307	384
Pension Costs	111	123
AROs and NDT Fund	196	233
Taxes Recoverable Through Future Rate (net)	89	80
Deferred Tax Liabilities, Other	12	171
Total Non-Current Liabilities	6,288	5,922
Accumulated Deferred Investment Tax Credit	265	279
Net Total Noncurrent Deferred Income Taxes and ITC	5,713	5,240
Deferred Tax Liabilities, Net, Noncurrent	5,448	4,961
PSE&G [Member]
Income Taxes [Line Items]
Regulatory Liability Excess Deferred Tax	606	602
OPEB	114	116
Total Noncurrent Assets	720	718
Plant-Related Items	3,622	3,311
New Jersey Corporate Business Tax	486	378
Conservation Costs	36	24
Pension Costs	159	152
Taxes Recoverable Through Future Rate (net)	89	80
Deferred Tax Liabilities, Other	84	86
Total Non-Current Liabilities	4,476	4,031
Accumulated Deferred Investment Tax Credit	74	78
Net Total Noncurrent Deferred Income Taxes and ITC	3,830	3,391
Deferred Tax Liabilities, Net, Noncurrent	3,756	3,313
Power [Member]
Income Taxes [Line Items]
Contractual Liabilities & Environmental Costs	9	12
Related to Uncertain Tax Positions	60	45
Pension Costs	52	40
Other	98	93
Total Noncurrent Assets	219	190
Plant-Related Items	1,189	935
New Jersey Corporate Business Tax	260	225
AROs and NDT Fund	197	235
Total Non-Current Liabilities	1,646	1,395
Accumulated Deferred Investment Tax Credit	192	201
Net Total Noncurrent Deferred Income Taxes and ITC	1,619	1,406
Deferred Tax Liabilities, Net, Noncurrent	$ 1,427	$ 1,205