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New And Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2012
New And Significant Accounting Policies [Abstract]  
Components Of Net Periodic Benefit Cost
                                 
     Pension Benefits     Other Benefits  
     Three Months Ended
March 31,		     Three Months Ended
March 31,		  
(in millions)    2012     2011     2012     2011  

Service cost for benefits earned

    $ 99     $ 82     $ 12     $ 11  

Interest cost

      164       164       21       23  

Expected return on plan assets

      (149 )      (167 )      (19 )      (20 ) 

Amortization of transition obligation

      -        -        6       6  

Amortization of prior service cost

      5       9       6       6  

Amortization of unrecognized loss

      31       12       1       1  
    

 

 

    

 

 

    

 

 

    

 

 

  

Net periodic benefit cost

      150       100       27       27  

Less: transfer to regulatory account (1)

     (75 )      (36 )      -        -   
    

 

 

    

 

 

    

 

 

    

 

 

  

Total

    $  75     $  64     $  27     $  27  
    

 

 

    

 

 

    

 

 

    

 

 

  

  (1) 

The Utility recorded $75 million and $36 million for the three months ended March 31, 2012 and 2011, respectively, to a regulatory account as the amounts are probable of recovery from customers in future rates.