Property, Plant, And Equipment (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Property, Plant And Equipment [Abstract]
Construction expenditures in accounts payable	$ 194,000,000
Public utilities, property, plant and equipment, net	25,586,797,000	25,609,285,000
Estimated Fair Value of Nuclear Plant	162,000,000
Carrying Value of Nuclear Plant	517,500,000
Asset Impairment Charges	355,500,000
After-Tax Asset Impairment Charge	$ 223,500,000