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Changes in Accumulated Other Comprehensive Income (Exelon, Generation, ComEd, PECO and BGE)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]    
Accumulated Other Comprehensive Income Loss [Text Block]
 For the Three Months Ended March 31, 2014 Gains and (Losses) on Cash Flow Hedges Unrealized Gains and (Losses) on Marketable Securities Pension and Non-Pension Postretirement Benefit Plan items Foreign Currency Items AOCI of Equity Investments Total
Exelon (a)            
 Beginning balance$120$2$(2,260)$(10)$108$(2,040)
 OCI before reclassifications (1) 0 (13) (5) 11 (8)
 Amounts reclassified from AOCI (b) (24) 0 35 0 1 12
 Net current-period OCI (25) 0 22 (5) 12 4
 Ending balance$95$2$(2,238)$(15)$120$(2,036)
              
Generation (a)            
 Beginning balance$114$2$0$(10)$108$214
 OCI before reclassifications (1) (3) 0 (5) 11 2
 Amounts reclassified from AOCI (b) (24) 0 0 0 1 (23)
 Net current-period OCI (25) (3) 0 (5) 12 (21)
 Ending balance$89$(1)$0$(15)$120$193
              
ComEd (a)            
              
PECO (a)            
 Beginning balance$0$1$0$0$0$1
 OCI before reclassifications 0 0 0 0 0 0
 Amounts reclassified from AOCI (b) 0 0 0 0 0 0
 Net current-period OCI 0 0 0 0 0 0
 Ending balance$0$1$0$0$0$1
              
BGE (a)            

       

(a) All amounts are net of tax. Amounts in parenthesis represent a decrease in accumulated other comprehensive income.

(b) See tables following changes in accumulated other comprehensive income tables for details about these reclassifications.

 Three Months Ended March 31, 2014  
Details about AOCI components Items reclassified out of AOCI (a) Affected line item in the statement where Net Income is presented
   Exelon Generation  
        
Gains on cash flow hedges  
 Energy related hedges$39$39 Operating revenues
   39 39 Total before tax
   (15) (15) Tax (expense)
  $24$24 Net of tax
        
Gains and (losses) on available for sale securities  
        
Amortization of pension and other postretirement benefit plan items
 Prior service costs$(2)$0 (b)
 Actuarial losses (56) 0 (b)
   (58) 0 Total before tax
   23 0 Tax benefit
  $(35)$0 Net of tax
        
Equity investments
 Capital activity$(1)$(1) Equity in losses of unconsolidated affiliates
   (1) (1) Total before tax
   0 0 Tax benefit
  $(1)$(1) Net of tax
        
Total Reclassifications      
 for the period$(12)$23 Net of Tax
        
        
 Three Months Ended March 31, 2013  
Details about AOCI components Items reclassified out of AOCI (a) Affected line item in the statement where Net Income is presented
   Exelon Generation  
        
Gains on cash flow hedges  
 Energy related hedges$99$223 Operating revenues
 Other cash flow hedges (1) 0 Interest expense
   98 223 Total before tax
   (40) (88) Tax (expense)
  $58$135 Net of tax
        
Gains and (losses) on available for sale securities  
        
Amortization of pension and other postretirement benefit plan items
 Actuarial losses$(83)$0 (b)
   (83) 0 Total before tax
   33 0 Tax benefit
  $(50)$0 Net of tax
        
Equity investments
 Capital activity$(3)$(3) Equity in losses of unconsolidated affiliates
   (3) (3) Total before tax
   1 1 Tax benefit
  $(2)$(2) Net of tax
        
Total Reclassifications      
 for the period$6$133 Net of Tax

       

(a) All amounts are net of tax. Amounts in parenthesis represent a decrease in net income.

(b) This accumulated other comprehensive income component is included in the computation of net periodic pension and OPEB cost (see Note 11 for additional details).

 

   Three Months Ended
   March 31,
   2014 2013
 Exelon     
 Pension and non-pension postretirement benefit plans:     
  Prior service benefit reclassified to periodic benefit cost$(1) $0
  Actuarial loss reclassified to periodic cost (23)  (32)
  Pension and non-pension postretirement benefit plans valuation     
  adjustment 7  (49)
 Change in unrealized loss on cash flow hedges 18  33
 Change in unrealized income on equity investments (7)  (18)
       
 Total$(6) $(66)
        
 Generation     
 Change in unrealized gain (loss) on cash flow hedges$19 $86
 Change in unrealized income on equity investments (7)  (18)
 Change in unrealized loss on marketable securities (2)  0
        
 Total$10 $68
        
 [1]

13. Changes in Accumulated Other Comprehensive Income (Exelon, Generation, and PECO)

 

The following tables present changes in accumulated other comprehensive income (loss) (AOCI) by component for the three months ended March 31, 2014 and 2013:

 For the Three Months Ended March 31, 2013 Gains and (Losses) on Cash Flow Hedges Unrealized Gains and (Losses) on Marketable Securities Pension and Non-Pension Postretirement Benefit Plan items Foreign Currency Items AOCI of Equity Investments Total
Exelon (a)            
 Beginning balance$368$0$(3,137)$0$2$(2,767)
 OCI before reclassifications 0 (1) 76 (1) 26 100
 Amounts reclassified from AOCI (b) (58) 0 50 0 2 (6)
 Net current-period OCI (58) (1) 126 (1) 28 94
 Ending balance$310$(1)$(3,011)$(1)$30$(2,673)
              
Generation (a)            
 Beginning balance$513$(1)$(19)$0$20$513
 OCI before reclassifications 5 (1) 0 (1) 26 29
 Amounts reclassified from AOCI (b) (135) 0 0 0 2 (133)
 Net current-period OCI (130) (1) 0 (1) 28 (104)
 Ending balance$383$(2)$(19)$(1)$48$409
              
ComEd (a)            
              
PECO (a)            
 Beginning balance$0$1$0$0$0$1
 OCI before reclassifications 0 0 0 0 0 0
 Amounts reclassified from AOCI (b) 0 0 0 0 0 0
 Net current-period OCI 0 0 0 0 0 0
 Ending balance$0$1$0$0$0$1
              
BGE (a)            
[1] (a) All amounts are net of tax. Amounts in parenthesis represent a decrease in net income.