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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2013
Income Taxes [Line Items]  
Income Tax Expense Benefit Detail [Text Block]
For the Year Ended December 31, 2013Exelon  Generation  ComEd  PECO  BGE
                
Included in operations:              
Federal              
 Current$ 744 $ 250 $ 160 $ 126 $ 9
 Deferred  140   360   (27)   23   100
 Investment tax credit amortization  (15)   (11)   (2)   (1)   (1)
State              
 Current  181   50   50   16   —
 Deferred  (6)   (34)   (29)   (2)   26
                
 Total$ 1,044 $ 615 $ 152 $ 162 $ 134
                
For the Year Ended December 31, 2012Exelon  Generation  ComEd  PECO  BGE
                
Included in operations:              
Federal              
 Current$ 37 $ 104 $ (40) $ 88 $ (97)
 Deferred  701   326   237   25   101
 Investment tax credit amortization  (11)   (6)   (2)   (2)   (1)
State              
 Current  (25)   (12)   6   4   —
 Deferred  (75)   88   38   12   4
                
 Total$ 627 $ 500 $ 239 $ 127 $ 7
                
For the Year Ended December 31, 2011Exelon  Generation  ComEd  PECO  BGE
                
Included in operations:              
Federal              
 Current$ 1 $ 431 $ (329) $ (71) $ (71)
 Deferred  1,200   435   544   223   130
 Investment tax credit amortization  (12)   (7)   (3)   (2)   (1)
State              
 Current  (3)   74   (123)   (37)   —
 Deferred  271   123   161   33   17
                
 Total$ 1,457 $ 1,056 $ 250 $ 146 $ 75

__________

(a)        Exelon activity for the twelve months ended December 31, 2012 includes the results of Constellation and BGE for March 12, 2012 - December 31, 2012. Generation activity for the twelve months ended December 31, 2012 includes the results of Constellation for March 12, 2012 - December 31, 2012.

(b)       BGE activity represents the activity for the twelve months ended December 31, 2012 and 2011.

(c)       Prior to the close of the merger, the Registrants recorded the applicable taxes on merger transaction costs assuming the merger would not be completed. Upon closing of the merger, the Registrants reversed such taxes for those merger transaction costs that were determined to be non tax-deductible upon successful completion of a merger.

 

 

Net interest receivable (payable) as ofExelon  Generation  ComEd  PECO  BGE
                
December 31, 2013$ (349) $ (37) $ (174) $ 3 $ —
December 31, 2012  31   (20)   107   2   —

Net interest expense (income) for the years endedExelon  Generation  ComEd  PECO  BGE
                
December 31, 2013$ 391 $ 17 $ 281 $ (1) $ —
December 31, 2012  (1)   11   (20)   (1)   9
December 31, 2011  (56)   (40)   (14)   (1)   (3)
Effective Income Tax Rate Reconciliation
For the Year Ended December 31, 2013ExelonGenerationComEd PECO BGE
            
U.S. Federal statutory rate 35.0% 35.0% 35.0% 35.0% 35.0%
Increase (decrease) due to:          
 State income taxes, net of Federal income tax benefit 4.7  1.6  3.4  1.6  4.9 
 Qualified nuclear decommissioning trust fund income 3.7  6.1  —  —  — 
 Tax exempt income (0.2)  (0.3)  —  —  — 
 Health care reform legislation 0.1  —  0.7  —  0.2 
 Amortization of investment tax credit, net deferred taxes (1.9)  (3.0)  (0.6)  (0.1)  — 
 Production tax credits and other credits (2.1)  (3.4)  (0.1)  —  — 
 Plant basis differences (1.6)  —  (0.8)  (7.1)  (0.2) 
 Other (0.1)  0.7  0.3  (0.3)  (0.9) 
            
Effective income tax rate 37.6% 36.7% 37.9% 29.1% 39.0%
            
For the Year Ended December 31, 2012Exelon (a)Generation (a)ComEd PECO BGE (b)
            
U.S. Federal statutory rate 35.0% 35.0% 35.0% 35.0% 35.0%
Increase (decrease) due to:          
 State income taxes, net of Federal income tax benefit (3.6)  4.7  4.6  2.0  24.3 
 Qualified nuclear decommissioning trust fund income 5.4  9.1  —  —  — 
 Tax exempt income (0.2)  (0.4)  —  —  — 
 Health care reform legislation 0.1  —  0.4  —  11.6 
 Amortization of investment tax credit, net deferred taxes (1.1)  (1.3)  (0.4)  (0.3)  (8.6) 
 Production tax credits and other credits (2.2)  (3.7)  —  —  — 
 Plant basis differences (2.4)  —  (0.3)  (11.5)  (9.0) 
 Merger expenses (c) 2.4  —  —  —  24.2 
 Fines and Penalties 2.6  4.4  —  —  — 
 Other (1.1)  (0.5)  (0.6)  (0.2)  (13.9) 
            
Effective income tax rate 34.9% 47.3% 38.7% 25.0% 63.6%
            
For the Year Ended December 31, 2011Exelon Generation ComEd PECO BGE (b)
            
U.S. Federal statutory rate 35.0% 35.0% 35.0% 35.0% 35.0%
Increase (decrease) due to:          
 State income taxes, net of Federal income tax benefit 4.4  4.5  3.6  (0.5)  5.2 
 Qualified nuclear decommissioning trust fund income 0.5  0.7  —  —  — 
 Domestic production activities deduction (0.3)  (0.4)  —  —  — 
 Tax exempt income (0.2)  (0.2)  —  —  — 
 Health care reform legislation (0.2)  —  (1.0)  —  (0.5) 
 Amortization of investment tax credit (0.3)  (0.3)  (0.4)  (0.3)  (0.5) 
 Production tax credits (0.9)  (1.2)  —  —  — 
 Plant basis differences (1.0)  —  (0.3)  (6.9)  (2.0) 
 Other (0.2)  (0.7)  0.6  —  (1.7) 
            
Effective income tax rate 36.8% 37.4% 37.5% 27.3% 35.5%
Tax Effects Of Temporary Differences [Text Block]
For the Year Ended December 31, 2013Exelon Generation ComEd PECO BGE
             
 Plant basis differences$ (11,612)$ (3,879)$ (3,523)$ (2,573)$ (1,538)
 Accrual based contracts  (214)  (214)  —  —  —
 Derivatives and other financial instruments  (509)  (505)  (4)  —  —
 Deferred pension and post-retirement obligation  1,489  (362)  (522)  —  (74)
 Nuclear decommissioning activities  (647)  (646)  —  —  —
 Deferred debt refinancing costs  173  79  (21)  (3)  (5)
 Regulatory  (1,611)  —  (241)  42  (253)
 Tax loss carryforward  252  76  47  11  52
 Tax credit carryforward  534  534  —  —  —
 Investment in CENG  (541)  (541)  —  —  —
 Other, net  804  67  154  122  26
             
Deferred income tax liabilities (net)$ (11,882)$ (5,391)$ (4,110)$ (2,401)$ (1,792)
Unamortized investment tax credits  (490)  (454)  (22)  (3)  (6)
             
Total deferred income tax liabilities (net) and           
 unamortized investment tax credits$ (12,372)$ (5,845)$ (4,132)$ (2,404)$ (1,798)
             
For the Year Ended December 31, 2012Exelon Generation ComEd PECO BGE
             
 Plant basis differences$ (10,689)$ (3,545)$ (3,537)$ (2,437)$ (1,553)
 Accrual based contracts  (389)  (389)  —  —  —
 Derivatives and other financial instruments  (392)  (479)  (4)  —  —
 Deferred pension and post-retirement obligation  2,356  (439)  (598)  (11)  (12)
 Nuclear decommissioning activities  (604)  (604)  —  —  —
 Deferred debt refinancing costs  (537)  163  (25)  (4)  (4)
 Regulatory  (1,857)  —  (116)  50  (253)
 Tax loss carryforward  421  226  32  14  105
 Tax credit carryforward  226  226  —  —  —
 Investment in CENG  (405)  (419)  —  —  —
 Other, net  701  9  83  100  67
             
Deferred income tax liabilities (net)$ (11,169)$ (5,251)$ (4,165)$ (2,288)$ (1,650)
Unamortized investment tax credits  (251)  (216)  (24)  (3)  (6)
             
Total deferred income tax liabilities (net) and           
 unamortized investment tax credits$ (11,420)$ (5,467)$ (4,189)$ (2,291)$ (1,656)
Summary Of Loss Carryforwards [Text Block]
   Exelon   Generation  ComEd  PECO  BGE 
                  
Federal                 
Federal net operating loss $377(a) $36 $139 $0 $31 
Deferred taxes on Federal net operating loss  132   13  49  0  11 
Federal general business credits carryforward  556(b)  556  0  0  0 
                  
State                 
State net operating losses and other credit                  
carryforwards  3,061(c)  1,498(d) 0  167(e) 768(f)
Deferred taxes on state tax attributes (net)  161   82  0  11  41 
Valuation allowance on state tax attributes  13   11  0  0  1 

__________

  • Exelon's federal net operating loss will expire beginning in 2031
  • Exelon's federal general business credit carryforwards will expire beginning in 2032
  • Exelon's state net operating losses and other carryforwards, which are presented on a post-apportioned basis, will expire beginning in 2014
  • Generation's state net operating losses losses and other carryforwards, which are presented on a post-apportioned basis, will expire beginning in 2014
  • PECO's state net operating losses will expire beginning in 2031
  • BGE's state net operating losses will expire beginning in 2026

 
Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns Roll Forward [Text Block]
 Exelon  Generation  ComEd  PECO  BGE
                
Unrecognized tax benefits at January 1, 2013$ 1,024 $ 876 $ 67 $ 44 $ —
Increases based on tax positions related to 2013  19   19   —   —   —
Change to positions that only affect timing  649   36   257   —   —
Increases based on tax positions prior to 2013  493   493   —   —   —
Decreases based on tax positions prior to 2013  (6)   (5)   —   —   —
Decreases from expiration of statute of limitations  (4)   (4)   —   —   —
                
Unrecognized tax benefits at December 31, 2013$ 2,175 $ 1,415 $ 324 $ 44 $ —
                
 Exelon  Generation  ComEd  PECO  BGE
                
Unrecognized tax benefits at January 1, 2012$ 807 $ 683 $ 70 $ 48 $ 11
Merger Balance Transfer  195   183   —   —   —
Increases based on tax positions related to 2012  34   3   —   —   —
Change to positions that only affect timing  (88)   (69)   (3)   (4)   (11)
Increases based on tax positions prior to 2012  91   91   —   —   —
Decreases based on tax positions prior to 2012  (6)   (6)   —   —   —
Decreases related to settlements with taxing authorities  (2)   (2)   —   —   —
Decreases from expiration of statute of limitations  (7)   (7)   —   —   —
                
Unrecognized tax benefits at December 31, 2012$ 1,024 $ 876 $ 67 $ 44 $ —
                
 Exelon  Generation  ComEd  PECO  BGE
                
Unrecognized tax benefits at January 1, 2011$ 787 $ 664 $ 72 $ 44 $ 73
Increases based on tax positions related to 2011  5   1   —   4   —
Change to positions that only affect timing  21   24   (2)   —   (62)
Decreases based on tax positions prior to 2011  (3)   (3)   —   —   —
Decrease from expiration of statute of limitations  (3)   (3)   —   —   —
                
Unrecognized tax benefits at December 31, 2011$ 807 $ 683 $ 70 $ 48 $ 11