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Regulatory Matters (Tables)
 6 Months Ended
Jun. 30, 2013
Regulatory Matters [Line Items]  
Regulatory assets and liabilities
June 30, 2013Exelon ComEd PECO BGE
                             
Regulatory assetsCurrent Noncurrent  Current Noncurrent  Current Noncurrent  Current Noncurrent 
Pension and other postretirement                           
 benefits (a)$308 $3,622  $0 $0  $0 $0  $0 $0 
Deferred income taxes 14  1,409   5  64   0  1,279   9  66 
AMI programs 4  99   4  22   0  32   0  45 
AMI meter events 0  17   0  0   0  17   0  0 
Under-recovered distribution service                            
 costs 84  245   84  245   0  0   0  0 
Debt costs 12  63   9  58   3  5   1  9 
Fair value of BGE long-term debt (b) 0  233   0  0   0  0   0  0 
Fair value of BGE supply contract (c) 46  6   0  0   0  0   0  0 
Severance 29  14   25  0   0  0   4  14 
Asset retirement obligations  0  93   0  68   0  25   0  0 
MGP remediation costs  49  215   42  184   6  30   1  1 
RTO start-up costs  2  1   2  1   0  0   0  0 
Under-recovered electric universal                            
 service fund costs 3  0   0  0   3  0   0  0 
Renewable energy and associated                            
 RECs 16  69   16  69   0  0   0  0 
Under-recovered energy and                            
 transmission costs  71  0   71  0   0  0   0  0 
DSP Program costs 0  3   0  0   0  3   0  0 
DSP II Program costs 2  1   0  0   2  1   0  0 
Deferred storm costs 3  4   0  0   0  0   3  4 
Electric generation-related                            
 regulatory asset 13  37   0  0   0  0   13  37 
Rate stabilization deferral 68  194   0  0   0  0   68  194 
Energy efficiency and demand                           
 response programs 42  152   0  0   0  0   42  152 
Merger integration costs (d) 1  10   0  0   0  0   1  10 
Other  37  32   16  21   21  8   0  4 
                             
Total regulatory assets$804  6,519  $274 $732  $35 $1,400  $142 $536 

June 30, 2013Exelon ComEd PECO BGE
                             
Regulatory liabilitiesCurrent Noncurrent  Current Noncurrent  Current Noncurrent  Current Noncurrent 
Nuclear decommissioning$0 $2,434  $0 $2,068  $0 $366  $0 $0 
Removal costs  99  1,422   78  1,201   0  0   21  221 
Energy efficiency and demand                            
 response programs 98  0   31  0   67  0   0  0 
DLC Program Costs 1  11   0  0   1  11   0  0 
Energy efficiency Phase 2 0  7   0  0   0  7   0  0 
Electric distribution tax repairs 20  121   0  0   20  121   0  0 
Gas distribution tax repairs 8  42          8  42        
Over-recovered energy and                            
 transmission costs 78  4   2  4   66(e) 0   10(i) 0 
Over-recovered gas universal                            
 service fund costs 3  0   0  0   3  0   0  0 
Revenue subject to refund (f) 40  0   40  0   0  0   0  0 
Over-recovered electric and gas                           
 revenue decoupling (g) 8  0   0  0   0  0   8  0 
Other 2  3   0  3   1  0   1  0 
                             
Total regulatory liabilities $357 $4,044  $151 $3,276  $166 $547  $40 $221 
                            

December 31, 2012Exelon ComEd PECO BGE
                             
Regulatory assetsCurrent Noncurrent  Current Noncurrent  Current Noncurrent  Current Noncurrent 
Pension and other postretirement                           
 benefits (a)$304 $3,673  $0 $0  $0 $0  $0 $0 
Deferred income taxes 14  1,382   5  62   0  1,255   9  65 
AMI programs 3  70   3  10   0  29   0  31 
AMI meter events 0  17   0  0   0  17   0  0 
Under-recovered distribution service                            
 costs 18  191   18  191   0  0   0  0 
Debt costs 14  68   11  62   3  6   1  9 
Fair value of BGE long-term debt (b) 0  256   0  0   0  0   0  0 
Fair value of BGE supply contract (c) 77  12   0  0   0  0   0  0 
Severance 29  28   25  12   0  0   4  16 
Asset retirement obligations  0  90   0  65   0  25   0  0 
MGP remediation costs  58  232   51  197   6  33   1  2 
RTO start-up costs  3  2   3  2   0  0   0  0 
Under-recovered electric universal                            
 service fund costs 11  0   0  0   11  0   0  0 
Financial swap with Generation 0  0   226  0   0  0   0  0 
Renewable energy and associated                            
 RECs 18  49   18  49   0  0   0  0 
Under-recovered energy and                            
 transmission costs  43  0   14  0   1(h) 0   28(i) 0 
DSP Program costs 1  3   0  0   1  3   0  0 
DSP II Program costs 1  2   0  0   1  2   0  0 
Deferred storm costs 3  6   0  0   0  0   3  6 
Electric generation-related                            
 regulatory asset 16  40   0  0   0  0   16  40 
Rate stabilization deferral 67  225   0  0   0  0   67  225 
Energy efficiency and demand                           
 response programs 56  126   0  0   0  0   56  126 
Under-recovered electric                            
 revenue decoupling (g) 5  0   0  0   0  0   5  0 
Other  23  25   14  16   9  8   0  2 
                             
Total regulatory assets$764 $6,497  $388 $666  $32 $1,378  $190 $522 

December 31, 2012Exelon ComEd PECO BGE
                             
Regulatory liabilitiesCurrent Noncurrent  Current Noncurrent  Current Noncurrent  Current Noncurrent 
Nuclear decommissioning$0 $2,397  $0 $2,037  $0 $360  $0 $0 
Removal costs  97  1,406   75  1,192   0  0   22  214 
Energy efficiency and demand                            
 response programs 131  0   43  0   88  0   0  0 
Electric distribution tax repairs 20  132   0  0   20  132   0  0 
Gas distribution tax repairs 8  46   0  0   8  46        
Over-recovered uncollectible                            
 accounts 6  0   6  0   0  0   0  0 
Over-recovered energy and                            
 transmission costs 54  0   6  0   48(e) 0   0  0 
Over-recovered gas universal                            
 service fund costs 3  0   0  0   3  0   0  0 
Over-recovered AEPS costs 2  0   0  0   2  0   0  0 
Revenue subject to refund (f) 40  0   40  0   0  0   0  0 
Over-recovered gas revenue                           
 decoupling (g) 7  0   0  0   0  0   7  0 
                             
Total regulatory liabilities $368 $3,981  $170 $3,229  $169 $538  $29 $214 
                            

       

  • Pension and other postretirement benefit regulatory assets include a regulatory asset established at the date of the merger related to BGE's portion of the deferred costs associated with legacy Constellation's pension and other postretirement benefit plans. That BGE-related regulatory asset is being amortized over a period of approximately 12 years, which generally represents the expected average remaining service period of plan participants at the date of the merger
  • Represents the regulatory asset recorded at Exelon Corporate for the difference in the fair value of the long-term debt of BGE as of the merger date. The asset is amortized over the life of the underlying debt. See Note 11 – Debt and Credit Agreements for additional information.
  • Represents the regulatory asset recorded at Exelon Corporate representing the fair value of BGE's supply contracts as of the close of the merger date. BGE is allowed full recovery of the costs of its electric and gas supply contracts through approved, regulated rates. The asset is amortized over a period of approximately 3 years.
  • ReIates to integration costs to achieve distribution synergies related to the merger transaction.
  • Includes $35 million related to the over-recovered electric supply costs under the GSA, $24 million related to the over-recovered natural gas costs under the PGC and $7 million related to over-recovered electric transmission costs as of June 30, 2013. As of December 31, 2012, includes $47 million related to the over-recovered electric supply costs under the GSA and $1 million related to the over-recovered natural gas costs under the PGC.
  • Primarily represents the regulatory liability for revenue subject to refund recorded pursuant to the ICC's order in the 2007 Rate Case. See Note 3 of Exelon's 2012 Form 10-K for additional information regarding the 2007 Rate Case.
  • Represents the electric and gas distribution costs recoverable from or refundable to customers under BGE's decoupling mechanism. As of June 30, 2013, includes $1 million of under-recovered electric distribution costs and $9 million of over-recovered gas distribution costs under BGE's decoupling mechanism. As of December 31, 2012, relates to $5 million of under-recovered electric distribution costs and $7 million of over-recovered gas distribution costs under BGE's decoupling mechanism.
  • Relates to under-recovered transmission costs.
  • Relates to $7 million of over-recovered natural gas supply costs and to $3 million of over-recovered natural electric supply costs as of June 30, 2013. As of December 31, 2012, includes to $9 million of under-recovered electric supply costs and $19 million of under-recovered natural gas supply costs.

 

As of June 30, 2013Exelon ComEd PECO BGE
Purchased receivables (a)$ 230 $ 87 $ 70 $ 73
Allowance for uncollectible accounts (b)  (24)   (13)   (6)   (5)
Purchased receivables, net$ 206 $ 74 $ 64 $ 68
             
As of December 31, 2012Exelon ComEd PECO BGE
Purchased receivables (a)$ 191 $ 55 $ 65 $ 71
Allowance for uncollectible accounts (b)  (21)   (9)   (6)   (6)
Purchased receivables, net$ 170 $ 46 $ 59 $ 65

__________

(a)       PECO's gas POR program became effective on January 1, 2012 and includes a 1% discount on purchased receivables in order to recover the implementation costs of the program. If the costs are not fully recovered when PECO files its next gas distribution rate case, PECO will propose a mechanism to recover the remaining implementation costs as a distribution charge to low volume transportation customers or apply future discounts on purchased receivables from natural gas suppliers serving those customers.

(b)       For ComEd and BGE, reflects the incremental allowance for uncollectible accounts recorded, which is in addition to the purchase discount. For ComEd, the incremental uncollectible accounts expense is recovered through its Purchase of Receivables with Consolidated Billing (PORCB) tariff.