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NUCLEAR PLANT (Tables)
12 Months Ended
Dec. 31, 2013
Schedule Of Nuclear Decommissioning Trusts Investments [Abstract]  
Schedule Of Nuclear Decommissioning Trusts Investments
NUCLEAR DECOMMISSIONING TRUSTS
(Dollars in millions)
   GrossGrossEstimated
   UnrealizedUnrealizedFair
  CostGainsLossesValue
At December 31, 2013:        
Debt securities:        
Debt securities issued by the U.S. Treasury and other         
U.S. government corporations and agencies(1)$ 116$ 3$ (2)$ 117
Municipal bonds(2)  110  2  (1)  111
Other securities(3)  155  3  (5)  153
Total debt securities  381  8  (8)  381
Equity securities  207  409  (2)  614
Cash and cash equivalents  39    39
Total $ 627$ 417$ (10)$ 1,034
At December 31, 2012:        
Debt securities:        
Debt securities issued by the U.S. Treasury and other         
U.S. government corporations and agencies$ 147$ 9$$ 156
Municipal bonds  57  6   63
Other securities  121  10  (1)  130
Total debt securities  325  25  (1)  349
Equity securities  249  292  (2)  539
Cash and cash equivalents  20    20
Total$ 594$ 317$ (3)$ 908
(1)Maturity dates are 2014-2056.        
(2)Maturity dates are 2014-2062.        
(3)Maturity dates are 2014-2111.        
Schedule Of Sales Of Securities By Nuclear Decommissioning Trusts [Abstract]  
Schedule Of Sales Of Securities By Nuclear Decommissioning Trusts
SALES OF SECURITIES
(Dollars in millions)
  Years ended December 31,
  201320122011
Proceeds from sales(1)$ 685$ 723$ 715
Gross realized gains  26  21  75
Gross realized losses  (18)  (13)  (52)
(1)Excludes securities that are held to maturity.