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Retirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2013
Retirement Benefits [Line Items]  
Schedule Of Pension And Other Postretirement Participation [Text Block]
  Operating Company
Name of Plan:Generation ComEd PECO BGE BSC
Qualified Pension Plans:         
Exelon Corporation Retirement ProgramX X X   X
Exelon Corporation Cash Balance Pension PlanX X X   X
Exelon Corporation Pension Plan for          
 Bargaining Unit EmployeesX X     X
Exelon New England Union Employees Pension PlanX        
Exelon Employee Pension Plan for Clinton,         
 TMI and Oyster CreekX X     X
Pension Plan of Constellation Energy Group, Inc.X     X X
Constellation Mystic Power, LLC Union Employees         
 Pension Plan Including Plan A and Plan BX        
           
Non-Qualified Pension Plans:         
Exelon Corporation Supplemental Pension Benefit Plan          
 and 2000 Excess Benefit PlanX X X   X
Exelon Corporation Supplemental Management          
 Retirement PlanX X X   X
Constellation Energy Group, Inc. Senior Executive         
 Supplemental PlanX     X X
Constellation Energy Group, Inc. Supplemental         
 Pension PlanX     X X
Constellation Energy Group, Inc. Benefits Restoration         
 PlanX     X X
Baltimore Gas & Electric Company Executive         
 Benefit PlanX     X X
Baltimore Gas & Electric Company Manager         
 Benefit PlanX     X X
           
Other Postretirement Benefit Plans:         
PECO Energy Company Retiree Medical PlanX   X   X
Exelon Corporation Health Care ProgramX X     X
Exelon Corporation Employees' Life Insurance PlanX X X   X
Constellation Energy Group, Inc. Retiree Medical Plan X     X X
Constellation Energy Group, Inc. Retiree Dental PlanX     X X
Constellation Energy Group, Inc. Employee Life         
 Insurance Plan and Family Life Insurance PlanX     X X
Constellation Mystic Power, LLC Post-Employment         
 Medical Account Savings PlanX        
Exelon New England Union Post-Employment         
 Medical Savings Account PlanX        
Defined Benefit Plan Change In Benefit Obligation RollForward [Text Block]
       Other
 Pension Benefits Postretirement Benefits
 2013 2012 2013 2012
Change in benefit obligation:           
Net benefit obligation at beginning of year$16,800 $13,538 $4,820 $4,062
Service cost 317  280  162  156
Interest cost 650  698  194  205
Plan participants’ contributions 0  0  34  34
Actuarial loss (gain) (1,363)  1,520  (551)  313
Plan amendments  1  0  15  (103)
Acquisitions/divestitures 0  1,880  0  362
Curtailments 0  (10)  0  (8)
Settlements(a) (69)  (169)  0  0
Contractual termination benefits 0  15  0  6
Gross benefits paid (877)  (952)  (223)  (219)
Federal subsidy on benefits paid 0  0  0  12
            
Net benefit obligation at end of year$15,459 $16,800 $4,451 $4,820
            
Change in plan assets:           
Fair value of net plan assets at beginning of year$13,357 $11,302 $2,135 $1,797
Actual return on plan assets 821  1,484  209  197
Employer contributions 339  149  83  325
Plan participants’ contributions 0  0  34  34
Benefits paid(b) (877)  (952)  (223)  (218)
Acquisitions/divestitures 0  1,543  0  0
Settlements(a) (69)  (169)  0  0
            
Fair value of net plan assets at end of year$13,571 $13,357 $2,238 $2,135
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
        Other
  Pension Benefits Postretirement Benefits
  2013 2012 2013 2012
Other current liabilities$12 $15 $23 $23
Pension obligations 1,876  3,428  0  0
Non-pension postretirement benefit obligations 0  0  2,190  2,662
             
Unfunded status (net benefit obligation less            
 net plan assets)$1,888 $3,443 $2,213 $2,685
Defined Benefit Plan Pension Plans With Projected Benefit Obligations And Accumulated Benefit Obligations In Excess Of Plan Assets [Text Block]
 PBO in excess of plan assets
 2013 2012
      
Projected benefit obligation$15,452 $16,800
Fair value of net plan assets 13,564  13,357
      
      
 ABO in excess of plan assets
 2013 2012
      
Projected benefit obligation$15,452 $16,796
Accumulated benefit obligation 14,552  15,657
Fair value of net plan assets 13,564  13,353
Schedule of Defined Benefit Plans Disclosures [Text Block]
   Pension Benefits Other Postretirement Benefits
   2013 2012 2011 2013 2012 2011
Components of net periodic benefit                  
 cost:                  
Service cost$317 $280 $212 $162 $156 $142
Interest cost 650  698  649  194  205  207
Expected return on assets (1,015)  (988)  (939)  (132)  (115)  (111)
Amortization of:                 
 Transition obligation 0  0  0  0  11  9
 Prior service cost (credit) 14  15  14  (19)  (17)  (38)
 Actuarial loss 562  450  331  83  81  66
Curtailment benefits 0  0  0  0  (7)  0
Settlement charges 9  31  0  0  0  0
Contractual termination benefits (a) 0  14  0  0  6  0
                    
Net periodic benefit cost$537 $500 $267 $288 $320 $275

  • ComEd and BGE established regulatory assets of $1 million and $4 million, respectively, for their portion of the contractual termination benefit charge in 2012.

 
Prescription Drug Benefit Reduction In Accumulated Postretirement Benefit Obligation For Subsidy [Text Block]
 2013 2012 2011
         
Amortization of the actuarial experience loss$0 $(17) $3
Reduction in current period service cost 0  0  9
Reduction in interest cost on the APBO 0  0  16
         
Total effect of subsidy on net periodic postretirement benefit cost$0 $(17) $28
Changes In Plan Assets And Benefit Obligations Recognized In OCI And Regulatory Assets [Text Block]

(a)       Represents cash settlements only.

(b)       Exelon's other postretirement benefits paid for the year ended December 31, 2012 are net of $1.3 million of reinsurance proceeds received from the Department of Health and Human Services as part of the Early Retiree Reinsurance Program pursuant to the Affordable Care Act of 2010. In 2013, the Program was no longer accepting applications for reimbursement.

 

   Pension Benefits Other Postretirement Benefits
   2013 2012 2011 2013 2012 2011
Changes in plan assets and benefit                 
 obligations recognized in AOCI                  
 and regulatory assets (liabilities):                 
Current year actuarial (gain) loss$(1,169) $1,693 $744 $(628) $304 $74
Amortization of actuarial gain (loss) (562)  (450)  (331)  (83)  (81)  (66)
Current year prior service (credit) cost 0  1  0  15  (109)  0
Amortization of prior service (cost)                 
 credit (14)  (15)  (14)  19  17  38
Current year transition (asset) obligation 0  0  0  0  1  0
Amortization of transition asset                 
 (obligation) 0  0  0  0  (11)  (9)
Curtailments 0  (10)  0  0  (1)  0
Settlements (8)  (31)  0  0  0  0
                    
Total recognized in AOCI and                  
 regulatory assets (liabilities)(a)$(1,753) $1,188 $399 $(677) $120 $37

Of the $1,753 million gain related to pension benefits, $1,071 million and $682 million were recognized in AOCI and regulatory assets, respectively, during 2013. Of the $677 million gain related to other postretirement benefits, $352 million and $325 million were recognized in AOCI and regulatory assets (liabilities), respectively, during 2013. Of the $1,188 million loss related to pension benefits, $283 million and $904 million were recognized in AOCI and regulatory assets, respectively, during 2012. Of the $120 million loss related to other postretirement benefits, $39 million and $81 million were recognized in AOCI and regulatory assets, respectively, during 2012. Of the $399 million loss related to pension benefits, $181 million and $218 million were recognized in AOCI and regulatory assets, respectively, during 2011. Of the $37 million loss related to other postretirement benefits, $13 million and $24 million were recognized in AOCI and regulatory assets, respectively, during 2011.

 
Changes In Plan Assets And Benefit Obligations Not Recognized In OCI And Regulatory Assets [Text Block]
 Pension Benefits Other Postretirement Benefits
 2013 2012 2013 2012
Prior service cost (credit)$62 $76 $(73) $(107)
Actuarial loss 6,192  7,931  474  1,185
            
Total(a)$6,254 $8,007 $401 $1,078

 

(a)       Of the $6,254 million related to pension benefits, $3,523 million and $2,731 million are included in AOCI and regulatory assets, respectively, at December 31, 2013. Of the $401 million related to other postretirement benefits, $161 million and $240 million are included in AOCI and regulatory assets (liabilities), respectively, at December 31, 2013. Of the $8,007 million related to pension benefits, $4,594 million and $3,413 million are included in AOCI and regulatory assets, respectively, at December 31, 2012. Of the $1,078 million related to other postretirement benefits, $514 million and $564 million are included in AOCI and regulatory assets, respectively, at December 31, 2012.

 
Defined Benefit Plan Amounts That Will Be Amortized From Accumulated Other Comprehensive Income Loss And Regulatory Assets In Next Fiscal Year [Text Block]
  Pension Benefits Other Postretirement Benefits
Prior service cost (credit) $14 $(16)
Actuarial loss  427  32
       
Total(a) $441 $16

 

(a)       Of the $441 million related to pension benefits at December 31, 2013, $232 million and $209 million are expected to be amortized from AOCI and regulatory assets in 2013, respectively. Of the $16 million related to other postretirement benefits at December 31, 2013, $7 million and $9 million are expected to be amortized from AOCI and regulatory assets in 2013, respectively.

 
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation [Text Block]
   Pension Benefits Other Postretirement Benefits
   2013 2012 2011 2013 2012 2011
Discount rate4.80% 3.92% 4.74% 4.90% 4.00% 4.80%
Rate of compensation increase(a) (b) 3.75% (a) (b) 3.75%
Mortality tableIRS required mortality table for 2014 funding valuation IRS required mortality table for 2013 funding valuation IRS required mortality table for 2012 funding valuation IRS required mortality table for 2014 funding valuation IRS required mortality table for 2013 funding valuation IRS required mortality table for 2012 funding valuation
Health care cost trend on covered chargesN/A N/A N/A 6.00% decreasing to ultimate trend of 5.00% in 2017 6.50% decreasing to ultimate trend of 5.00% in 2017 6.50% decreasing to ultimate trend of 5.00% in 2017
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost [Text Block]
   Pension Benefits Other Postretirement Benefits
   2013 2012 2011 2013 2012 2011
Discount rate3.92% (a) 4.74% (b) 5.26% 4.00% (a) 4.80% (b) 5.30%
Expected return on plan assets7.50% (c) 7.50% (c) 8.00% (c) 6.45% (c) 6.68% (c) 7.08% (c)
Rate of compensation increase(d) 3.75% 3.75% (d) 3.75% 3.75%
Mortality tableIRS required mortality table for 2013 funding valuation IRS required mortality table for 2012 funding valuation IRS required mortality table for 2011 funding valuation IRS required mortality table for 2013 funding valuation IRS required mortality table for 2012 funding valuation IRS required mortality table for 2011 funding valuation
Health care cost trend on covered chargesN/A N/A N/A 6.50% decreasing to ultimate trend of 5.00% in 2017 6.50% decreasing to ultimate trend of 5.00% in 2017 7.00% decreasing to ultimate trend of 5.00% in 2015

 

(a)       The discount rates above represent the initial discount rates used to establish Exelon's pension and other postretirement benefits costs for the year ended December 31, 2013. Certain of the benefit plans were remeasured during the year using discount rates of 4.21% and 4.66% for pension and other postretirement benefits, respectively. Costs for the year ended December 31, 2013 reflect the impact of these remeasurements.

(b)        The discount rates above represent the initial discounts rates used to establish Exelon's pension and other postretirement benefits costs for 2012. Certain of the benefit plans were remeasured during the year due to the Constellation merger, plan settlement and curtailment events, and plan changes using discount rates of 3.71% and 3.72% for pension and other postretirement benefits, respectively. Costs for the year ended December 31, 2012 reflect the impact of these remeasurements.

(c)       Not applicable to pension and other postretirement benefit plans that do not have plan assets.

(d)       3.25% for 2013-2017 and 3.75% thereafter.

 
Pension And Other Postretirement Benefit Contributions [Text Block]
 Pension Benefits Other Postretirement Benefits
 2013 2012 2011 (c) 2013 (a) 2012 (a) 2011 (a)
Generation$119 $48 $954 $30 $135 $121
ComEd 118  25  873  4  119  108
PECO 11  13  110  20  33  28
BGE (b) 0  0  0  24  12  0
BSC 91  63  157  5  24  20
                  
Exelon$339 $149 $2,094 $83 $323 $277

(a)       The Registrants present the cash contributions above net of Federal subsidy payments received on each of their respective Consolidated Statements of Cash Flows. Exelon, Generation, ComEd, PECO, and BGE received Federal subsidy payments of $10 million, $5 million, $4 million, $1 million and $2 million, respectively, in 2012, and $11 million, $5 million, $4 million, $1 million and $3 million, respectively, in 2011. Effective January 1, 2013, Exelon is no longer receiving this subsidy.

(b)       BGE's pension benefit contributions for 2012 and 2011 exclude $0 million and $54 million, respectively, of pension contributions made by BGE prior to the closing of Exelon's merger with Constellation on March 12, 2012. BGE's other postretirement benefit payments for 2012 and 2011 exclude $4 million and $13 million, respectively, of other postretirement benefit payments made by BGE prior to the closing of Exelon's merger with Constellation on March 12, 2012. These pre-merger contributions are not included in Exelon's financial statements but are reflected in BGE's financial statements.

(c)       The increase in 2011 pension contributions was related to Exelon's $2.1 billion contribution to its pension plans as a result of accelerated cash benefits associated with the Tax Relief Act of 2010.

 
Defined Benefit Plan Estimated Future Benefit Payments [Text Block]
    Other Postretirement
 Pension Benefits Benefits
2014$929 $204
2015 851  210
2016 873  219
2017 902  228
2018 1,015  238
2019 through 2023 5,257  1,383
      
Total estimated future benefit payments through 2023$9,827 $2,482
Schedule Of Pension And Other Postretirement Benefit Costs [Text Block]
                 
For the Year Ended December 31, Generation  ComEd  PECO  BSC (a)  BGE (b)(c) Exelon
                   
2013 $347 $309 $43 $71 $55 $825
2012  341  282  50  99  60  820
2011  249  213  32  48  51  542

___________________       

 

  • These amounts primarily represent amounts billed to Exelon's subsidiaries through intercompany allocations. These amounts are not included in the Generation, ComEd, PECO or BGE amounts above. As of December 31, 2012, ComEd and BGE each reported a regulatory asset of $1 million related to their BSC-billed portion of the second quarter 2012 contractual termination benefit charge.
  • The amounts included in capital and operating and maintenance expense for the years ended December 31, 2012 and 2011 include $12 million and $51 million, respectively, in costs incurred prior to the closing of Exelon's merger with Constellation on March 12, 2012. These amounts are not included in Exelon's capital expenditures and operating and maintenance expense for the years ended December 31, 2012 and 2011.
  • BGE's pension and other postretirement benefit costs for the year ended December 31, 2012 include a $3 million contractual termination benefit charge, which was recorded as a regulatory asset as of December 31, 2012.

 

 
Defined Benefit Plan Weighted Average Asset Allocations And Target Allocations [Text Block]
Pension Plans   Percentage of Plan Assets 
    at December 31, 
Asset CategoryTarget Allocation 2013 2012
          
Equity securities31%  35%  35%
Fixed income securities38%  37   40 
Alternative investments (a)31%  28   25 
          
Total    100%  100%
          
Other Postretirement Benefit Plans   Percentage of Plan Assets 
    at December 31, 
Asset CategoryTarget Allocation 2013 2012
          
Equity securities41%  45%  46%
Fixed income securities39%  37   40 
Alternative investments (a)20%  18   14 
          
Total    100%  100%

 

(a) Alternative investments include private equity, hedge funds and real estate.

 
Defined Benefit Plan Fair Value Of Plan Assets [Text Block]
At December 31, 2013 (a)Level 1 Level 2 Level 3 Total
             
Pension plan assets           
 Equity securities:           
  Individually held  3,090  0  2  3,092
  Commingled funds  0  1,167  0  1,167
  Mutual funds 270  0  0  270
 Equity securities subtotal 3,360  1,167  2  4,529
 Fixed income securities:           
  Debt securities issued by the U.S. Treasury and           
  other U.S. government corporations and agencies  908  9  0  917
  Debt securities issued by states of the United States            
  and by political subdivisions of the states  0  88  0  88
  Foreign debt securities 0  205  0  205
  Corporate debt securities  0  2,927  41  2,968
  Federal agency mortgage-backed securities  0  90  0  90
  Non-Federal agency mortgage-backed securities  0  26  0  26
  Commingled funds  0  558  0  558
  Mutual funds 5  315  0  320
  Derivative instruments (b):           
  Assets 0  7  0  7
  Liabilities 0  (134)  0  (134)
 Fixed income securities subtotal 913  4,091  41  5,045
 Private equity 0  0  806  806
 Hedge funds 0  1,266  1,039  2,305
 Real estate:           
  Individually held 264  0  0  264
  Commingled funds 0  2  0  2
  Real estate funds 0  0  582  582
 Real estate subtotal 264  2  582  848
Pension plan assets subtotal 4,537  6,526  2,470  13,533
             
Other postretirement benefit plan assets           
 Cash equivalents 51  0  0  51
 Equity securities:           
  Individually held  286  0  0  286
  Commingled funds  0  515  0  515
  Mutual funds 164  0  0  164
 Equity securities subtotal 450  515  0  965
 Fixed income securities:           
  Debt securities issued by the U.S. Treasury and           
  other U.S. government corporations and agencies  17  1  0  18
  Debt securities issued by states of the United States            
  and by political subdivisions of the states  0  149  0  149
  Foreign debt securities 0  2  0  2
  Corporate debt securities  0  50  0  50
  Federal agency mortgage-backed securities  0  45  0  45
  Non-Federal agency mortgage-backed securities  0  7  0  7
  Commingled funds  0  218  0  218
  Mutual funds 305  0  0  305
 Fixed income securities subtotal 322  472  0  794
 Private equity 0  0  2  2
 Hedge funds 0  295  4  299
 Real estate:           
  Individually held 8  0  0  8
  Real estate funds 0  5  109  114
 Real estate subtotal 8  5  109  122
Other postretirement benefit plan assets subtotal 831  1,287  115  2,233
             
Total pension and other postretirement            
 benefit plan assets (c)$5,368 $7,813 $2,585 $15,766
             
At December 31, 2012 (a)Level 1 Level 2 Level 3 Total
             
Pension plan assets           
 Cash equivalents$1 $0 $0 $1
 Equity securities:           
  Individually held  2,562  0  0  2,562
  Commingled funds  0  1,111  0  1,111
  Mutual funds 323  0  0  323
 Equity securities subtotal 2,885  1,111  0  3,996
 Fixed income securities:           
  Debt securities issued by the U.S. Treasury and           
  other U.S. government corporations and agencies  1,037  0  0  1,037
  Debt securities issued by states of the United States            
  and by political subdivisions of the states  0  108  0  108
  Foreign debt securities 0  252  0  252
  Corporate debt securities  0  3,330  0  3,330
  Federal agency mortgage-backed securities  0  117  0  117
  Non-Federal agency mortgage-backed securities  0  28  0  28
  Commingled funds  0  274  0  274
  Mutual funds 4  291  0  295
  Derivative instruments (b):           
  Assets 0  9  0  9
  Liabilities 0  (21)  0  (21)
 Fixed income securities subtotal 1,041  4,388  0  5,429
 Private equity 0  0  754  754
 Hedge funds 0  1,080  1,235  2,315
 Real estate:           
  Individually held 280  0  0  280
  Commingled funds 0  75  0  75
  Real estate funds 0  0  426  426
 Real estate subtotal 280  75  426  781
Pension plan assets subtotal 4,207  6,654  2,415  13,276
             
Other postretirement benefit plan assets           
 Cash equivalents 44  0  0  44
 Equity securities:           
  Individually held  198  0  0  198
  Commingled funds  0  530  0  530
  Mutual funds 230  0  0  230
 Equity securities subtotal 428  530  0  958
 Fixed income securities:           
  Debt securities issued by the U.S. Treasury and           
  other U.S. government corporations and agencies  18  0  0  18
  Debt securities issued by states of the United States            
  and by political subdivisions of the states  0  125  0  125
  Foreign debt securities 0  3  0  3
  Corporate debt securities  0  50  0  50
  Federal agency mortgage-backed securities  0  52  0  52
  Non-Federal agency mortgage-backed securities  0  6  0  6
  Commingled funds  0  271  0  271
  Mutual funds 295  2  0  297
 Fixed income securities subtotal 313  509  0  822
 Private equity 0  0  1  1
 Hedge funds 0  188  12  200
 Real estate:           
  Individually held 7  0  0  7
  Commingled funds 0  2  0  2
  Real estate funds 0  6  95  101
 Real estate subtotal 7  8  95  110
Other postretirement benefit plan assets subtotal 792  1,235  108  2,135
             
Total pension and other postretirement            
 benefit plan assets (c)$4,999 $7,889 $2,523 $15,411

 

  • See Note 11 - Fair Value of Assets and Liabilities for a description of levels within the fair value hierarchy.
  • Derivative instruments have a total notional amount of $2,651 million and $2,498 million at December 31, 2013 and 2012, respectively. The notional principal amounts for these instruments provide one measure of the transaction volume outstanding as of the fiscal years ended and do not represent the amount of the company's exposure to credit or market loss.
  • Excludes net assets of $43 million and $81 million at December 31, 2013 and 2012, respectively, which are required to reconcile to the fair value of net plan assets. These items consist primarily of receivables related to pending securities sales, interest and dividends receivable, and payables related to pending securities purchases.

 
Defined Benefit Plan Fair Value Of Plan Assets Unobservable Input Reconciliation [Text Block]
                 
   Hedge Private Real Debt Preferred   
 funds equity estate securities stock Total
                    
Pension Assets                 
Balance as of January 1, 2013$1,235 $754 $426 $0 $0 $2,415
Actual return on plan assets:                  
 Relating to assets still held at the reporting date 143  86  63  0  0  292
 Relating to assets sold during the period 3  0  (4)  0  0  (1)
Purchases, sales and settlements:                 
 Purchases 360  123  226  41  2  752
 Sales (76)  0  (91)  0  0  (167)
 Settlements(a) (3)  (157)  (38)  0  0  (198)
Transfers into (out of) Level 3(b) (623)  0  0  0  0  (623)
                    
Balance as of December 31, 2013$1,039 $806 $582 $41 $2 $2,470
                    
Other Postretirement Benefits                 
Balance as of January 1, 2013$12 $1 $95 $0 $0 $108
Actual return on plan assets:                  
 Relating to assets still held at the reporting date 1  0  11  0  0  12
 Relating to assets sold during the period 0  0  0  0  0  0
Purchases, sales and settlements:                 
 Purchases 0  1  3  0  0  4
 Sales (1)  0  0  0  0  (1)
 Settlements(a) (4)  0  0  0  0  (4)
Transfers into (out of) Level 3(b) (4)  0  0  0  0  (4)
                    
Balance as of December 31, 2013$4 $2 $109 $0 $0 $115
                    
   Hedge Private Real Debt Preferred   
 funds equity estate securities stock Total
                    
Pension Assets                 
Balance as of January 1, 2012$1,525 $672 $229 $0 $0 $2,426
Actual return on plan assets:                  
 Relating to assets still held at the reporting date 138  55  24  0  0  217
Purchases, sales and settlements:                 
 Purchases 447  108  134  0  0  689
 Sales (6)  0  0  0  0  (6)
 Settlements(a) (4)  (128)  (28)  0  0  (160)
Transfers into (out of) Level 3(c)(d)(e) (865)  47  67  0  0  (751)
                    
Balance as of December 31, 2012$1,235 $754 $426 $0 $0 $2,415
                    
Other Postretirement Benefits                 
Balance as of January 1, 2012$157 $1 $7 $0 $0 $165
Actual return on plan assets:                  
 Relating to assets still held at the reporting date 11  0  3  0  0  14
Purchases, sales and settlements:                 
 Purchases 32  0  91  0  0  123
 Sales 0  0  0  0  0  0
 Settlements(a) 0  0  (1)  0  0  (1)
Transfers into (out of) Level 3(c)(d)(e) (188)  0  (5)  0  0  (193)
                    
Balance as of December 31, 2012$12 $1 $95 $0 $0 $108

  • Represents cash settlements only.
  • As of December 31, 2012, hedge fund investments that contained redemption restrictions limiting Exelon's ability to redeem the investments within a reasonable period of time were classified as Level 3 investments. As of December 31, 2013, restrictions for certain investments no longer applied, therefore allowing redemption within a reasonable period of time from the measurement date at NAV. As such, these hedge fund investments are reflected as transfers out of Level 3 to Level 2 of $627 million in 2013.
  • In connection with the acquisition of Constellation in March 2012, Exelon assumed Constellation's pension plan assets resulting in transfers into Level 3 of $141 million.
  • In 2012, Exelon refined its policy over the criteria that hedge fund investments must meet in order to be categorized within Level 2 and Level 3 of the fair value hierarchy. Therefore, certain hedge fund investments that were categorized within Level 3 in prior periods have been re-categorized as Level 2 investments as of December 31, 2012. The re-categorization of these hedge fund investments is reflected as transfers out of Level 3 of $1.1 billion.
  • In 2012, the liquidity terms of a certain real estate investment changed to allow redemption within a reasonable period of time from the redemption date which led to a transfer out of Level 3 to Level 2 of $5 million.

 
Schedule Of Defined Contributions [Text Block]
For the Year Ended December 31, Exelon  Generation  ComEd  PECO  BGE (a) BSC (b)
                  
2013$85 $40 $22 $8 $8 $7
2012 67  30  19  7  7  5
2011 78  40  22  9  7  7