Pension, Other Postretirement Benefits (OPEB) And Savings Plans (Schedule Of Pension And OPEB Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	$ 94	$ 174	$ 216
Pension Benefits [Member] | Power [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	29	54	65
Pension Benefits [Member] | PSE&G [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	51	97	120
Pension Benefits [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	14	23	31
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	81	141	131
Other Benefits [Member] | Power [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	12	17	11
Other Benefits [Member] | PSE&G [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	67	120	116
Other Benefits [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	$ 2	$ 4	$ 4