Income Taxes (Interest And Penalties Related To Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest and Penalties on Uncertain Tax Positions	$ 38	$ 395	$ 379
PSE&G [Member]
Interest and Penalties on Uncertain Tax Positions	1	(24)	(20)
Power [Member]
Interest and Penalties on Uncertain Tax Positions	(2)	(11)	(17)
Energy Holdings [Member]
Interest and Penalties on Uncertain Tax Positions	39	420	407
Other Subsidiaries [Member]
Interest and Penalties on Uncertain Tax Positions	$ 0	$ 10	$ 9

- Definition

This element represents the total of interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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