Organization, Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating Revenues	$ 2,318	$ 2,554	$ 2,310	$ 2,786	$ 2,406	$ 2,402	$ 2,098	$ 2,875	$ 9,968	$ 9,781	$ 11,079
Basis Adjustment	986								986
Net Income									1,243	1,275	1,503
Total Assets	32,522				31,725				32,522	31,725
Nuclear Production [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									60 years
Pumped Storage Facilities [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									76 years
Solar Assets [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									25 years
Minimum [Member] | General Plant Assets [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									3 years
Minimum [Member] | Fossil Production [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									10 years
Maximum [Member] | General Plant Assets [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									20 years
Maximum [Member] | Fossil Production [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives									79 years
Solar Source and Kalaeloa [Member]
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating Revenues									15	8	7
Net Income									16	19	11
Total Assets	$ 351				$ 291				$ 351	$ 291