Pension And OPEB (Schedule Of Pension And OPEB Costs) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Power [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	$ 6	$ 13	$ 24	$ 40
PSE&G [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	9	24	41	72
Others [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	3	6	11	18
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	18	43	76	130
Power [Member] | OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	3	4	9	13
PSE&G [Member] | OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	16	30	51	90
Others [Member] | OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	0	1	2	3
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	$ 19	$ 35	$ 62	$ 106