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Segment Information - Reconciliation to Consolidated Financial Statements (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]                      
Revenues $ 8,343 $ 8,929 $ 7,689 $ 9,477 $ 8,812 $ 9,401 $ 8,074 $ 9,691 $ 34,438 $ 35,978 $ 33,558
Depreciation and amortization                 4,252 4,353 3,828
Operating Expenses                 30,096 32,143 29,619
Interest expense, net                 1,616 1,554 1,560
Income (loss) before income taxes                 3,985 2,225 3,775
Income taxes                 774 118 (126)
Net income (loss)                 3,028 2,079 3,869
Capital expenditures                 7,248 7,594 7,584
Assets [1] 124,977       119,634       124,977 119,634  
Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenues 1,107 1,380 1,091 1,228 1,115 1,359 1,074 1,249 4,806 4,798 4,672
Operating revenues from affiliates                 14 15 50
Income (loss) before income taxes                 514 425 571
Income taxes                 38 33 217
Net income (loss) 65 189 106 117 62 185 82 63 477 393 355
Capital expenditures                 1,355 1,375 1,396
Assets 22,719       21,952       22,719 21,952  
Exelon Generation Co L L C [Member]                      
Segment Reporting Information [Line Items]                      
Revenues 4,644 $ 4,774 $ 4,210 $ 5,296 5,069 $ 5,278 $ 4,579 $ 5,512 18,924 20,437 18,500
Operating revenues from affiliates                 1,172 1,268 1,115
Income (loss) before income taxes                 1,917 365 1,455
Income taxes                 516 (108) (1,376)
Net income (loss)                 1,217 443 2,798
Capital expenditures                 1,845 2,242 2,259
Assets [2] 48,995       47,556       48,995 47,556  
Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 487 303 592
Revenues                 34,438 35,978 33,560
Net income (loss)                 3,028 2,079 3,869
Assets 124,977       119,634       124,977 119,634  
Operating Segments [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (14) (7) 33
Revenues                     47
Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 (4) (5) (1)
Revenues                 (3,166) (3,294) (3,025)
Operating revenues from affiliates                 2 1 2
Depreciation and amortization                 0 0 0
Operating Expenses                 (3,154) (3,341) (3,026)
Interest expense, net                 0 0 0
Income (loss) before income taxes                 (2) (1) (2)
Income taxes                 0 0 0
Net income (loss)                 (2) (1) (2)
Capital expenditures                 0 0 0
Assets (10,089)       (9,800)       (10,089) (9,800)  
Intersegment Eliminations [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 (396) (437) (17)
Operating revenues from affiliates                 (397) (437) (19)
Depreciation and amortization                 0 0 (1)
Operating Expenses                 (396) (435) (17)
Interest expense, net                 1 0 (1)
Income (loss) before income taxes                 (489) (408) (404)
Income taxes                 1 (2) 0
Net income (loss)                 14 15 50
Capital expenditures                 0 0 0
Assets (5,810)       (5,421)       (5,810) (5,421)  
Exelon Generation Co L L C [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 491 308 593
Revenues                 18,924 20,437 18,500
Depreciation and amortization                 1,535 1,797 1,457
Operating Expenses                 17,628 19,510 18,001
Interest expense, net                 429 432 440
Income (loss) before income taxes                 1,917 365 1,455
Income taxes                 516 (108) (1,376)
Net income (loss)                 1,217 443 2,798
Capital expenditures                 1,845 2,242 2,259
Assets 48,995       47,556       48,995 47,556  
Exelon Generation Co L L C [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 1,172 1,269 1,110
Commonwealth Edison Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 0 0 0
Revenues                 5,747 5,882 5,536
Depreciation and amortization                 1,033 940 850
Operating Expenses                 4,580 4,741 4,214
Interest expense, net                 359 347 361
Income (loss) before income taxes                 851 832 984
Income taxes                 163 168 417
Net income (loss)                 688 664 567
Capital expenditures                 1,915 2,126 2,250
Assets 32,765       31,213       32,765 31,213  
Commonwealth Edison Co [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 30 27 15
PECO Energy Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 0 0 0
Revenues                 3,100 3,038 2,870
Depreciation and amortization                 333 301 286
Operating Expenses                 2,388 2,452 2,215
Interest expense, net                 136 129 126
Income (loss) before income taxes                 593 466 538
Income taxes                 65 6 104
Net income (loss)                 528 460 434
Capital expenditures                 939 849 732
Assets 11,469       10,642       11,469 10,642  
PECO Energy Co [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 6 8 7
Baltimore Gas and Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 0 0 0
Revenues                 3,106 3,169 3,176
Depreciation and amortization                 502 483 473
Operating Expenses                 2,574 2,696 2,562
Interest expense, net                 121 106 105
Income (loss) before income taxes                 439 387 525
Income taxes                 79 74 218
Net income (loss)                 360 313 307
Capital expenditures                 1,145 959 882
Assets 10,634       9,716       10,634 9,716  
Baltimore Gas and Electric Company [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 26 29 16
Pepco Holdings LLC [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 0 0 0
Revenues                 4,806 4,798 4,672
Depreciation and amortization                 754 740 675
Operating Expenses                 4,084 4,156 3,911
Interest expense, net                 263 261 245
Income (loss) before income taxes                 514 425 571
Income taxes                 38 33 217
Net income (loss)                 477 393 355
Capital expenditures                 1,355 1,375 1,396
Assets 22,719       21,952       22,719 21,952  
Pepco Holdings LLC [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 14 15 50
Potomac Electric Power Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 2,260 2,232 2,151
Depreciation and amortization                 374 385 321
Operating Expenses                 1,899 1,919 1,760
Interest expense, net                 133 128 121
Income (loss) before income taxes                 259 216 303
Income taxes                 16 11 105
Net income (loss)                 243 205 198
Capital expenditures                 626 656 628
Assets 8,661       8,267       8,661 8,267  
Potomac Electric Power Company [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 5 6 6
Delmarva Power & Light Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 1,306 1,332 1,300
Depreciation and amortization                 184 182 167
Operating Expenses                 1,089 1,143 1,071
Interest expense, net                 61 58 51
Income (loss) before income taxes                 169 142 192
Income taxes                 22 22 71
Net income (loss)                 147 120 121
Capital expenditures                 348 364 428
Assets 4,830       4,588       4,830 4,588  
Delmarva Power & Light Company [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 7 8 8
Atlantic City Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 1,240 1,236 1,186
Depreciation and amortization                 157 136 146
Operating Expenses                 1,089 1,087 1,029
Interest expense, net                 58 64 61
Income (loss) before income taxes                 99 87 103
Income taxes                 0 12 26
Net income (loss)                 99 75 77
Capital expenditures                 375 335 312
Assets 3,933       3,699       3,933 3,699  
Atlantic City Electric Company [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 3 3 2
Corporate and Other [Member] | Corporate, Non-Segment [Member]                      
Segment Reporting Information [Line Items]                      
Competitive businesses other revenues                 0 0 0
Revenues                 1,921 1,948 1,831
Depreciation and amortization                 95 92 87
Operating Expenses                 1,996 1,929 1,742
Interest expense, net                 308 279 283
Income (loss) before income taxes                 (327) (249) (296)
Income taxes                 (87) (55) 294
Net income (loss)                 (240) (193) (590)
Capital expenditures                 49 43 65
Assets 8,484       8,355       8,484 8,355  
Corporate and Other [Member] | Corporate, Non-Segment [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 396 435 52
Depreciation and amortization                 39 37 42
Operating Expenses                 403 442 68
Interest expense, net                 10 11 13
Income (loss) before income taxes                 476 388 377
Income taxes                 (1) (10) 15
Net income (loss)                 (26) (22) (91)
Capital expenditures                 6 20 28
Assets $ 11,105       $ 10,819       11,105 10,819  
Corporate and Other [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 1,913 1,942 1,824
Corporate and Other [Member] | Intersegment Eliminations [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 396 435 53
Generation Mid Atlantic [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 5,074 5,487 5,540
Generation Mid Atlantic [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 5,070 5,474 5,515
Generation Mid Atlantic [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 4 13 25
Generation Midwest [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 4,293 4,706 4,181
Generation Midwest [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 4,327 4,717 4,206
Generation Midwest [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 (34) (11) (25)
Segment Elimination [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Operating revenues from affiliates                 (3,159) (3,289) (3,020)
Electricity, Generation [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 15,120 16,155 14,227
Electricity, Generation [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (1,165) (1,256) (1,105)
Electricity, Generation [Member] | Exelon Generation Co L L C [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 16,285 17,411 15,332
Electricity, Generation [Member] | Commonwealth Edison Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Electricity, Generation [Member] | PECO Energy Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Electricity, Generation [Member] | Baltimore Gas and Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Electricity, Generation [Member] | Pepco Holdings LLC [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Electricity, Generation [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Natural Gas, US Regulated [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 167 181 161
Natural Gas, US Regulated [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 1,489 1,470 1,333
Natural Gas, US Regulated [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (15) (20) (10)
Natural Gas, US Regulated [Member] | Intersegment Eliminations [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Natural Gas, US Regulated [Member] | Exelon Generation Co L L C [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Natural Gas, US Regulated [Member] | Commonwealth Edison Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Natural Gas, US Regulated [Member] | PECO Energy Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 610 568 495
Natural Gas, US Regulated [Member] | Baltimore Gas and Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 727 741 687
Natural Gas, US Regulated [Member] | Pepco Holdings LLC [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 167 181 161
Natural Gas, US Regulated [Member] | Potomac Electric Power Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Natural Gas, US Regulated [Member] | Delmarva Power & Light Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 167 181 161
Natural Gas, US Regulated [Member] | Atlantic City Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Natural Gas, US Regulated [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Natural Gas, US Regulated [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 3 0
Service, Other [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (1,934) (1,960) (1,880)
Service, Other [Member] | Intersegment Eliminations [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (383) (420) (3)
Service, Other [Member] | Exelon Generation Co L L C [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | Commonwealth Edison Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | PECO Energy Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | Baltimore Gas and Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | Pepco Holdings LLC [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 13 15 49
Service, Other [Member] | Potomac Electric Power Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | Delmarva Power & Light Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | Atlantic City Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Service, Other [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 1,921 1,948 1,831
Service, Other [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 396 435 52
Electricity, US Regulated [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 4,639 4,609 4,428
Electricity, US Regulated [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 15,195 15,337 14,833
Electricity, US Regulated [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (47) (45) (29)
Electricity, US Regulated [Member] | Intersegment Eliminations [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (13) (17) (14)
Electricity, US Regulated [Member] | Exelon Generation Co L L C [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Electricity, US Regulated [Member] | Commonwealth Edison Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 5,747 5,882 5,536
Electricity, US Regulated [Member] | PECO Energy Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 2,490 2,470 2,375
Electricity, US Regulated [Member] | Baltimore Gas and Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 2,379 2,428 2,489
Electricity, US Regulated [Member] | Pepco Holdings LLC [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 4,626 4,602 4,462
Electricity, US Regulated [Member] | Potomac Electric Power Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 2,260 2,232 2,151
Electricity, US Regulated [Member] | Delmarva Power & Light Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 1,139 1,151 1,139
Electricity, US Regulated [Member] | Atlantic City Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 1,240 1,236 1,186
Electricity, US Regulated [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Electricity, US Regulated [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member] | Pepco Holdings LLC [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Oil and Gas, Purchased [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 2,147 2,710 2,575
Oil and Gas, Purchased [Member] | Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 (1) (8) 0
Oil and Gas, Purchased [Member] | Exelon Generation Co L L C [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 2,148 2,718 2,575
Oil and Gas, Purchased [Member] | Commonwealth Edison Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Oil and Gas, Purchased [Member] | PECO Energy Co [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Oil and Gas, Purchased [Member] | Baltimore Gas and Electric Company [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Oil and Gas, Purchased [Member] | Pepco Holdings LLC [Member] | Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 0 0 0
Oil and Gas, Purchased [Member] | Corporate and Other [Member] | Corporate, Non-Segment [Member]                      
Segment Reporting Information [Line Items]                      
Revenue from Contract with Customer, Including Assessed Tax                 $ 0 $ 0 $ 0
[1]
Exelon’s consolidated assets include $9,532 million and $9,667 million at December 31, 2019 and 2018, respectively, of certain VIEs that can only be used to settle the liabilities of the VIE. Exelon’s consolidated liabilities include $3,473 million and $3,548 million at December 31, 2019 and 2018, respectively, of certain VIEs for which the VIE creditors do not have recourse to Exelon. See Note 22–Variable Interest Entities for additional information.
[2]
Generation’s consolidated assets include $9,512 million and $9,634 million at December 31, 2019 and 2018, respectively, of certain VIEs that can only be used to settle the liabilities of the VIE. Generation’s consolidated liabilities include $3,429 million and $3,480 million at December 31, 2019 and 2018, respectively, of certain VIEs for which the VIE creditors do not have recourse to Generation. See Note 22–Variable Interest Entities for additional information.