Income Taxes (Deferred Income Tax) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Current (net)	$ 11,000,000	$ 24,000,000
Accumulated Other Comprehensive Income (Loss)	0	3,000,000
OPEB	269,000,000	280,000,000
Related to Uncertain Tax Positions	160,000,000	201,000,000
Deferred Tax Assets - Securitization Overcollection	55,000,000	0
Other	0	124,000,000
Total Noncurrent Assets	484,000,000	608,000,000
Total Assets	495,000,000	632,000,000
Current (net)	173,000,000	0
Current Deferred Tax Liabilities Securitization	163,000,000	0
Current Deferred Tax Liabilities Other	10,000,000	0
Plant-Related Items	5,422,000,000	4,865,000,000
New Jersey Corporate Business Tax	535,000,000	534,000,000
Securitization	0	279,000,000
Leasing Activities	623,000,000	639,000,000
Pension Costs	219,000,000	288,000,000
AROs and NDT Fund	419,000,000	523,000,000
Taxes Recoverable Through Future Rate (net)	196,000,000	181,000,000
Deferred Tax Liabilities, Other	240,000,000	293,000,000
Total Non-Current Liabilities	7,654,000,000	7,602,000,000
Total Liabilities	7,827,000,000	7,602,000,000
Net Current Deferred Tax Assets	11,000,000	24,000,000
Net Current Deferred Income Tax Liabilities	173,000,000	0
Net Noncurrent Deferred Income Tax Liabilities	7,170,000,000	6,994,000,000
Investment Tax Credit (ITC)	133,000,000	113,000,000
Net Total Noncurrent Deferred Income Taxes and ITC	7,303,000,000	7,107,000,000
PSE&G [Member]
Income Taxes [Line Items]
Current (net)	24,000,000	16,000,000
OPEB	173,000,000	182,000,000
Deferred Tax Assets - Securitization Overcollection	55,000,000	0
Total Noncurrent Assets	228,000,000	182,000,000
Total Assets	252,000,000	198,000,000
Current (net)	165,000,000	30,000,000
Current Deferred Tax Liabilities Securitization	163,000,000	0
Current Deferred Tax Liabilities Other	2,000,000	30,000,000
Plant-Related Items	3,869,000,000	3,439,000,000
New Jersey Corporate Business Tax	268,000,000	340,000,000
Securitization	0	279,000,000
Conservation Costs	48,000,000	52,000,000
Pension Costs	269,000,000	171,000,000
Taxes Recoverable Through Future Rate (net)	196,000,000	181,000,000
Deferred Tax Liabilities, Other	84,000,000	68,000,000
Total Non-Current Liabilities	4,734,000,000	4,530,000,000
Total Liabilities	4,899,000,000	4,560,000,000
Net Current Deferred Tax Assets	24,000,000	16,000,000
Net Current Deferred Income Tax Liabilities	165,000,000	30,000,000
Net Noncurrent Deferred Income Tax Liabilities	4,506,000,000	4,348,000,000
Investment Tax Credit (ITC)	69,000,000	58,000,000
Net Total Noncurrent Deferred Income Taxes and ITC	4,575,000,000	4,406,000,000
Power [Member]
Income Taxes [Line Items]
Current (net)	0	30,000,000
Contractual Liabilities & Environmental Costs	18,000,000	35,000,000
Related to Uncertain Tax Positions	23,000,000	32,000,000
Other	70,000,000	91,000,000
Total Noncurrent Assets	163,000,000	158,000,000
Total Assets	163,000,000	188,000,000
Current (net)	43,000,000	0
Plant-Related Items	1,552,000,000	1,416,000,000
New Jersey Corporate Business Tax	192,000,000	81,000,000
Pension Costs	0	77,000,000
AROs and NDT Fund	420,000,000	523,000,000
Deferred Tax Liabilities, Other	0	36,000,000
Total Non-Current Liabilities	2,164,000,000	2,135,000,000
Total Liabilities	2,207,000,000	2,135,000,000
Net Current Deferred Tax Assets	0	30,000,000
Net Current Deferred Income Tax Liabilities	43,000,000	0
Net Noncurrent Deferred Income Tax Liabilities	2,001,000,000	1,977,000,000
Investment Tax Credit (ITC)	64,000,000	54,000,000
Net Total Noncurrent Deferred Income Taxes and ITC	2,065,000,000	2,031,000,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	52,000,000	0
Deferred Tax Liabilities, Other Comprehensive Income	$ 0	$ 2,000,000