Commitments And Contingencies (Schedule Of Effective Income Tax Rate Reconciliation) (Details)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Income Taxes [Line Items]
Federal statutory income tax rate	35.00%		35.00%		35.00%		35.00%
State income tax (net of federal benefit)	2.90%	[1]	(25.00%)	[1]	1.90%	[1]	(2.10%)	[1]
Effect of regulatory treatment of fixed asset differences	(19.90%)	[2]	(10.10%)	[2]	(13.00%)	[2]	(2.90%)	[2],[3]
Tax credits	(0.40%)		(1.60%)		(0.50%)		(0.40%)
Benefit of loss carryback	0.20%		(1.90%)		(0.20%)		(0.20%)
Other, net	(5.20%)	[4]	(10.40%)	[4]	(2.80%)	[4]	(3.00%)	[4],[5]
Effective tax rate	12.60%		(14.00%)		20.40%		26.40%

[1] Includes the effect of state flow-through ratemaking treatment. Additionally, during the three months ended September 30, 2013, the Utility recorded an adjustment to state income taxes in connection with an IRS settlement.

[2] Represents effect of federal flow-through ratemaking treatment including those deductions related to repairs and certain other property-related costs discussed above.

[3] Million British Thermal Units.

[4] Primarily relates to research and development tax credits and other timing differences.

[5] The proceeds were used to repay the 4.80% Senior Notes, in the principal outstanding amount of $539 million, to fund capital expenditures, and for general corporate purposes.