XML 103 R42.htm IDEA: XBRL DOCUMENT v2.4.0.6
Accounts Receivable (Tables)
 12 Months Ended
Dec. 31, 2012
Schedule Of Accounts Notes Loans And Financing Receivable Text Block [Abstract]  
Schedule Of Accounts Notes Loans And Financing Receivable [Text Block]
2012Exelon  Generation  ComEd  PECO   BGE
                
Unbilled customer revenues $ 1,418 $ 859 $ 213 $ 164  $ 182
Allowance for uncollectible accounts (a)  (293)   (84)   (70)   (99)(b)   (40)
                
2011Exelon  Generation  ComEd  PECO   BGE
                
Unbilled customer revenues $ 902 $ 493 $ 246 $ 163  $ 194
Allowance for uncollectible accounts (a)  (199)   (29)   (78)   (92)(b)   (37)

(a) Includes the allowance for uncollectible accounts on customer and other accounts receivable.

(b)       Includes an allowance for uncollectible accounts of $7 million and $8 million at December 31, 2012 and 2011, respectively, related to PECO's current installment plan receivables described below.