Pension And OPEB (Schedule Of Pension And OPEB Costs) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Power [Member] | Pension Benefits [Member]
Total Benefit Costs	$ 8	$ 14	$ 18	$ 27
PSE&G [Member] | Pension Benefits [Member]
Total Benefit Costs	15	24	32	48
Others [Member] | Pension Benefits [Member]
Total Benefit Costs	4	6	8	12
Pension Benefits [Member]
Total Benefit Costs	27	44	58	87
Power [Member] | OPEB [Member]
Total Benefit Costs	3	5	6	9
PSE&G [Member] | OPEB [Member]
Total Benefit Costs	17	30	35	60
Others [Member] | OPEB [Member]
Total Benefit Costs	1	1	2	2
OPEB [Member]
Total Benefit Costs	$ 21	$ 36	$ 43	$ 71