v3.26.3
Segment Information - Reconciliation to Consolidated Financial Statements (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]                  
Total operating revenues $ 7,319     $ 6,705     $ 20,528 $ 18,846  
Operating and maintenance 1,564     1,172     4,416 3,840  
Taxes, Miscellaneous 468     429     1,335 1,216  
Gain on sale of assets 0     0     0 1  
Interest Expense, 587     531     1,702 1,560  
Other, net 97     68     256 185  
Income taxes 154     155     454 396  
Net income (loss) attributable to common shareholders 729 $ 396 $ 919 875 $ 391 $ 908 2,044 2,174  
Total assets 122,237           122,237   $ 116,570
Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Total operating revenues 2,260     2,051     6,002 5,408  
Operating and maintenance 510     290     1,212 876  
Taxes, Miscellaneous 150     150     445 426  
Gain on sale of assets 0     0     0 1  
Interest Expense, 110     102     323 303  
Other, net 23     18     62 54  
Income taxes 46     85     125 184  
Net income (loss) attributable to common shareholders 187 $ 109 $ 169 291 $ 143 $ 194 465 628  
Total assets 30,317           30,317   29,715
Related Party                  
Segment Reporting [Line Items]                  
Interest expense to affiliates, net 6     7     19 18  
Related Party | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 39     45     157 148  
Operating revenues from affiliates 5     2     10 7  
Interest expense to affiliates, net 1     0     3 2  
Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 7,319     6,705     20,528 18,846  
Operating and maintenance 1,564     1,172     4,416 3,840  
Depreciation and amortization 991     912     2,910 2,717  
Taxes, Miscellaneous 468     429     1,335 1,216  
Gain on sale of assets             0 (1)  
Interest Expense, 587     531     1,702 1,560  
Other, net (97)     (68)     (256) (185)  
Income taxes 154     155     454 396  
Net income (loss) attributable to common shareholders 729     875     2,044 2,174  
Capital expenditures 2,243     2,136     6,799 6,095  
Total assets 122,237           122,237   116,570
Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 0     0     0 0  
Interest expense to affiliates, net 6     7     19 18  
Intersegment Eliminations                  
Segment Reporting [Line Items]                  
Total operating revenues (484)     (457)     (1,474) (1,423)  
Operating and maintenance (227)     (202)     (613) (618)  
Depreciation and amortization 0     0     0 0  
Taxes, Miscellaneous 0     0     0 0  
Gain on sale of assets             0 0  
Interest Expense, 0     0     0 0  
Other, net 12     13     33 41  
Income taxes (1)     0     0 0  
Net income (loss) attributable to common shareholders (1)     0     0 0  
Capital expenditures 0     0     0 0  
Total assets (4,135)           (4,135)   (4,146)
Intersegment Eliminations | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Total operating revenues (107)     (108)     (342) (329)  
Operating and maintenance 0     0     0 0  
Depreciation and amortization 0     0     0 0  
Taxes, Miscellaneous 0     0     0 0  
Gain on sale of assets             0 0  
Interest Expense, 0     0     0 0  
Other, net 0     0     (1) 0  
Income taxes 0     0     0 0  
Net income (loss) attributable to common shareholders 0     0     0 0  
Capital expenditures 0     0     0 0  
Total assets (59)           (59)   (36)
Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates (267)     (270)     (894) (844)  
Operating revenues from affiliates 0     0     0 0  
Interest expense to affiliates, net 0     2     0 (2)  
Intersegment Eliminations | Related Party | Intersubsegment Eliminations                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates (479)     (453)     (1,464) (1,415)  
Intersegment Eliminations | Related Party | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates (108)     (108)     (342) (329)  
Operating revenues from affiliates (107)     (109)     (342) (329)  
Interest expense to affiliates, net 1     (1)     1 0  
Commonwealth Edison Co | Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 2,470     2,275     6,368 6,176  
Operating and maintenance 359     313     1,033 958  
Depreciation and amortization 438     395     1,258 1,162  
Taxes, Miscellaneous 133     107     345 303  
Gain on sale of assets             0 0  
Interest Expense, 146     132     418 385  
Other, net (43)     (33)     (116) (86)  
Income taxes 140     83     324 201  
Net income (loss) attributable to common shareholders 406     373     965 903  
Capital expenditures 851     781     2,522 1,970  
Total assets 50,538           50,538   48,285
Commonwealth Edison Co | Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 105     96     317 296  
Interest expense to affiliates, net 3     3     10 10  
Commonwealth Edison Co | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 2     2     15 19  
PECO Energy Co | Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 1,240     1,180     3,794 3,513  
Operating and maintenance 258     183     760 690  
Depreciation and amortization 126     115     373 336  
Taxes, Miscellaneous 73     69     204 183  
Gain on sale of assets             0 0  
Interest Expense, 74     63     213 179  
Other, net (15)     (11)     (39) (29)  
Income taxes 8     5     31 23  
Net income (loss) attributable to common shareholders 165     250     562 652  
Capital expenditures 505     502     1,469 1,334  
Total assets 21,314           21,314   19,362
PECO Energy Co | Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 55     58     189 182  
Interest expense to affiliates, net 2     2     6 9  
PECO Energy Co | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 5     3     13 9  
Baltimore Gas and Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 1,363     1,209     4,409 3,791  
Operating and maintenance 236     179     716 621  
Depreciation and amortization 161     155     496 473  
Taxes, Miscellaneous 100     93     301 273  
Gain on sale of assets             0 0  
Interest Expense, 73     64     202 183  
Other, net (26)     (15)     (64) (35)  
Income taxes 23     23     119 108  
Net income (loss) attributable to common shareholders 90     82     443 398  
Capital expenditures 402     407     1,224 1,211  
Total assets 18,441           18,441   17,184
Baltimore Gas and Electric Company | Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 56     60     194 186  
Interest expense to affiliates, net 0     0     0 0  
Baltimore Gas and Electric Company | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 2     2     7 6  
Pepco Holdings LLC | Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 2,260     2,051     6,002 5,408  
Operating and maintenance 510     290     1,212 876  
Depreciation and amortization 250     234     741 701  
Taxes, Miscellaneous 150     150     445 426  
Gain on sale of assets             0 (1)  
Interest Expense, 110     102     323 303  
Other, net (23)     (18)     (62) (54)  
Income taxes 46     85     125 184  
Net income (loss) attributable to common shareholders 187     291     465 628  
Capital expenditures 461     444     1,521 1,552  
Total assets 30,317           30,317   29,715
Pepco Holdings LLC | Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 39     45     157 148  
Interest expense to affiliates, net 1     0     3 2  
Pepco Holdings LLC | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 5     2     10 7  
Potomac Electric Power Company | Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 1,127     992     2,975 2,626  
Operating and maintenance 294     95     564 282  
Depreciation and amortization 115     110     343 321  
Taxes, Miscellaneous 128     122     359 344  
Gain on sale of assets             0 (1)  
Interest Expense, 58     53     169 159  
Other, net (13)     (11)     (37) (31)  
Income taxes (4)     41     29 89  
Net income (loss) attributable to common shareholders 40     156     173 337  
Capital expenditures 231     221     747 690  
Total assets 12,984           12,984   12,728
Potomac Electric Power Company | Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 60     59     198 184  
Interest expense to affiliates, net (1)     0     (1) 0  
Potomac Electric Power Company | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 3     2     7 4  
Delmarva Power and Light Company | Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 556     491     1,632 1,460  
Operating and maintenance 66     51     200 162  
Depreciation and amortization 67     63     200 189  
Taxes, Miscellaneous 16     21     66 63  
Gain on sale of assets             0 0  
Interest Expense, 28     26     81 75  
Other, net (7)     (4)     (14) (12)  
Income taxes 19     17     49 49  
Net income (loss) attributable to common shareholders 61     55     164 163  
Capital expenditures 129     125     429 402  
Total assets 6,981           6,981   6,789
Delmarva Power and Light Company | Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 42     43     139 134  
Interest expense to affiliates, net 0     0     0 0  
Delmarva Power and Light Company | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 3     2     7 6  
Atlantic City Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 579     570     1,402 1,328  
Operating and maintenance 61     55     166 161  
Depreciation and amortization 67     61     195 188  
Taxes, Miscellaneous 2     2     8 7  
Gain on sale of assets             0 0  
Interest Expense, 23     20     67 62  
Other, net (3)     (2)     (8) (8)  
Income taxes 32     29     48 48  
Net income (loss) attributable to common shareholders 90     82     139 138  
Capital expenditures 99     96     339 292  
Total assets 5,834           5,834   5,632
Atlantic City Electric Company | Operating Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 31     37     119 116  
Interest expense to affiliates, net 0     0     0 0  
Atlantic City Electric Company | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 1     1     4 3  
Corporate and Other | Corporate, Non-Segment                  
Segment Reporting [Line Items]                  
Total operating revenues 470     447     1,429 1,381  
Operating and maintenance 428     409     1,308 1,313  
Depreciation and amortization 16     13     42 45  
Taxes, Miscellaneous 12     10     40 31  
Gain on sale of assets             0 0  
Interest Expense, 184     170     546 510  
Other, net (2)     (4)     (8) (22)  
Income taxes (62)     (41)     (145) (120)  
Net income (loss) attributable to common shareholders (118)     (121)     (391) (407)  
Capital expenditures 24     2     63 28  
Total assets 5,762           5,762   6,170
Corporate and Other | Corporate, Non-Segment | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Total operating revenues 105     106     335 323  
Operating and maintenance 89     89     282 271  
Depreciation and amortization 1     0     3 3  
Taxes, Miscellaneous 4     5     12 12  
Gain on sale of assets             0 0  
Interest Expense, 1     3     6 7  
Other, net 0     (1)     (2) (3)  
Income taxes (1)     (2)     (1) (2)  
Net income (loss) attributable to common shareholders (4)     (2)     (11) (10)  
Capital expenditures 2     2     6 168  
Total assets 4,577           4,577   $ 4,602
Corporate and Other | Corporate, Non-Segment | Related Party                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 12     11     37 32  
Interest expense to affiliates, net 0     0     0 (1)  
Corporate and Other | Corporate, Non-Segment | Related Party | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Operating and maintenance from affiliates 14     14     43 43  
Interest expense to affiliates, net 1     1     3 2  
Corporate and Other | Intersegment Eliminations | Related Party                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 465     444     1,419 1,374  
Corporate and Other | Intersegment Eliminations | Related Party | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Operating revenues from affiliates 105     106     334 323  
Rate-regulated electric revenues                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 7,103     6,690     18,971 17,872  
Purchased power and/or fuel 2,865     2,645     7,380 6,640  
Rate-regulated electric revenues | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 2,218     2,016     5,846 5,280  
Purchased power and/or fuel 971     864     2,501 2,138  
Rate-regulated electric revenues | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 7,079     6,478     18,852 17,283  
Purchased power and/or fuel 2,865     2,645     7,380 6,640  
Rate-regulated electric revenues | Intersegment Eliminations                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues (8)     (6)     (32) (30)  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated electric revenues | Intersegment Eliminations | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues (7)     (5)     (17) (13)  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated electric revenues | Commonwealth Edison Co | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 2,470     2,275     6,368 6,176  
Purchased power and/or fuel 783     806     1,814 2,044  
Rate-regulated electric revenues | PECO Energy Co | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 1,155     1,097     3,178 2,933  
Purchased power and/or fuel 475     428     1,278 1,093  
Rate-regulated electric revenues | Baltimore Gas and Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 1,247     1,091     3,543 2,951  
Purchased power and/or fuel 636     547     1,787 1,365  
Rate-regulated electric revenues | Pepco Holdings LLC | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 2,215     2,021     5,795 5,253  
Purchased power and/or fuel 971     864     2,501 2,138  
Rate-regulated electric revenues | Potomac Electric Power Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 1,127     992     2,975 2,626  
Purchased power and/or fuel 450     367     1,178 942  
Rate-regulated electric revenues | Delmarva Power and Light Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 516     464     1,435 1,312  
Purchased power and/or fuel 245     211     655 580  
Rate-regulated electric revenues | Atlantic City Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 579     570     1,402 1,328  
Purchased power and/or fuel 276     286     668 616  
Rate-regulated electric revenues | Corporate and Other | Corporate, Non-Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated electric revenues | Corporate and Other | Corporate, Non-Segment | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated natural gas revenues                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 251     235     1,695 1,595  
Purchased power and/or fuel 52     47     524 471  
Rate-regulated natural gas revenues | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 40     27     197 148  
Purchased power and/or fuel 19     8     92 57  
Rate-regulated natural gas revenues | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 240     227     1,676 1,563  
Purchased power and/or fuel 52     47     524 471  
Rate-regulated natural gas revenues | Intersegment Eliminations                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues (1)     (1)     (3) (5)  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated natural gas revenues | Intersegment Eliminations | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated natural gas revenues | Commonwealth Edison Co | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated natural gas revenues | PECO Energy Co | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 85     83     616 580  
Purchased power and/or fuel 19     18     217 195  
Rate-regulated natural gas revenues | Baltimore Gas and Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 116     118     866 840  
Purchased power and/or fuel 14     21     215 219  
Rate-regulated natural gas revenues | Pepco Holdings LLC | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 40     27     197 148  
Purchased power and/or fuel 19     8     92 57  
Rate-regulated natural gas revenues | Potomac Electric Power Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated natural gas revenues | Delmarva Power and Light Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 40     27     197 148  
Purchased power and/or fuel 19     8     92 57  
Rate-regulated natural gas revenues | Atlantic City Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated natural gas revenues | Corporate and Other | Corporate, Non-Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Rate-regulated natural gas revenues | Corporate and Other | Corporate, Non-Segment | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Purchased power and/or fuel 0     0     0 0  
Shared service and other revenues | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Shared service and other revenues | Intersegment Eliminations                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues (475)     (450)     (1,439) (1,388)  
Shared service and other revenues | Intersegment Eliminations | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues (100)     (103)     (325) (316)  
Shared service and other revenues | Commonwealth Edison Co | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Shared service and other revenues | PECO Energy Co | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Shared service and other revenues | Baltimore Gas and Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Shared service and other revenues | Pepco Holdings LLC | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 5     3     10 7  
Shared service and other revenues | Potomac Electric Power Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Shared service and other revenues | Delmarva Power and Light Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Shared service and other revenues | Atlantic City Electric Company | Operating Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 0     0     0 0  
Shared service and other revenues | Corporate and Other | Corporate, Non-Segment                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues 470     447     1,429 1,381  
Shared service and other revenues | Corporate and Other | Corporate, Non-Segment | Pepco Holdings LLC                  
Segment Reporting [Line Items]                  
Electric and natural gas operating revenues $ 105     $ 106     $ 335 $ 323