v3.26.1
Segment Information - Reconciliation to Consolidated Financial Statements (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]              
Total operating revenues $ 5,967   $ 5,427   $ 13,209 $ 12,141  
Operating and maintenance 1,386   1,321   2,852 2,668  
Taxes, Miscellaneous 423   383   866 788  
Gain on sale of assets 0   2   0 1  
Interest Expense, 568   524   1,116 1,028  
Other, net 90   65   159 117  
Income taxes 99   70   300 240  
Net income (loss) attributable to common shareholders 396 $ 919 391 $ 908 1,315 1,300  
Total assets 120,505       120,505   $ 116,570
Pepco Holdings LLC              
Segment Reporting [Line Items]              
Total operating revenues 1,712   1,579   3,742 3,357  
Operating and maintenance 337   291   702 586  
Taxes, Miscellaneous 145   136   296 276  
Gain on sale of assets 0   2   0 1  
Interest Expense, 107   102   213 201  
Other, net 20   17   39 35  
Income taxes 32   42   79 99  
Net income (loss) attributable to common shareholders 109 $ 169 143 $ 194 278 337  
Total assets 30,008       30,008   29,715
Related Party              
Segment Reporting [Line Items]              
Interest expense to affiliates, net 6   7   12 12  
Related Party | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 58   49   118 103  
Operating revenues from affiliates 2   2   5 5  
Interest expense to affiliates, net 1   1   2 2  
Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 5,967   5,427   13,209 12,141  
Operating and maintenance 1,386   1,321   2,852 2,668  
Depreciation and amortization 968   902   1,920 1,805  
Taxes, Miscellaneous 423   383   866 788  
Gain on sale of assets 0   (2)   0 (1)  
Interest Expense, 568   524   1,116 1,028  
Other, net (90)   (65)   (159) (117)  
Income taxes 99   70   300 240  
Net income (loss) attributable to common shareholders 396   391   1,315 1,300  
Capital expenditures 2,200   2,013   4,558 3,959  
Total assets 120,505       120,505   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   12 12  
Intersegment Eliminations              
Segment Reporting [Line Items]              
Total operating revenues (481)   (485)   (990) (967)  
Operating and maintenance (174)   (212)   (385) (417)  
Depreciation and amortization 0   0   0 0  
Taxes, Miscellaneous 0   0   0 0  
Gain on sale of assets 0   0   0 0  
Interest Expense, 0   0   0 0  
Other, net 11   12   22 28  
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 (4,204)       (4,204)   (4,146)
Intersegment Eliminations | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Total operating revenues (122)   (113)   (234) (221)  
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   0 0  
Interest Expense, 0   0   0 0  
Other, net 0   0   0 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 (148)       (148)   (36)
Intersegment Eliminations | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates (318)   (285)   (625) (574)  
Operating revenues from affiliates 0   0   0 0  
Interest expense to affiliates, net 0   0   (2) (4)  
Intersegment Eliminations | Related Party | Intersubsegment Eliminations              
Segment Reporting [Line Items]              
Operating revenues from affiliates (479)   (483)   (984) (961)  
Intersegment Eliminations | Related Party | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates (122)   (113)   (234) (221)  
Operating revenues from affiliates (121)   (112)   (234) (221)  
Interest expense to affiliates, net 0   0   0 0  
Commonwealth Edison Co | Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 1,985   1,836   3,898 3,901  
Operating and maintenance 339   322   674 645  
Depreciation and amortization 416   387   820 767  
Taxes, Miscellaneous 107   97   212 196  
Gain on sale of assets 0   0   0 0  
Interest Expense, 140   128   272 253  
Other, net (41)   (31)   (73) (53)  
Income taxes 83   52   184 117  
Net income (loss) attributable to common shareholders 249   228   559 530  
Capital expenditures 786   599   1,671 1,189  
Total assets 49,947       49,947   48,285
Commonwealth Edison Co | Operating Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 110   100   212 200  
Interest expense to affiliates, net 3   3   7 7  
Commonwealth Edison Co | Intersegment Eliminations | Related Party              
Segment Reporting [Line Items]              
Operating revenues from affiliates 2   10   13 17  
PECO Energy Co | Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 1,062   1,000   2,554 2,333  
Operating and maintenance 232   242   502 507  
Depreciation and amortization 125   112   247 221  
Taxes, Miscellaneous 62   54   131 115  
Gain on sale of assets 0   0   0 0  
Interest Expense, 70   57   139 117  
Other, net (13)   (10)   (25) (18)  
Income taxes 8   4   23 17  
Net income (loss) attributable to common shareholders 119   136   397 402  
Capital expenditures 495   408   964 832  
Total assets 20,495       20,495   19,362
PECO Energy Co | Operating Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 68   63   134 124  
Interest expense to affiliates, net 2   3   5 7  
PECO Energy Co | Intersegment Eliminations | Related Party              
Segment Reporting [Line Items]              
Operating revenues from affiliates 3   3   7 6  
Baltimore Gas and Electric Company | Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 1,218   1,029   3,046 2,583  
Operating and maintenance 222   201   481 443  
Depreciation and amortization 166   154   334 318  
Taxes, Miscellaneous 96   85   200 181  
Gain on sale of assets 0   0   0 0  
Interest Expense, 68   61   129 120  
Other, net (22)   (11)   (38) (20)  
Income taxes 17   15   96 85  
Net income (loss) attributable to common shareholders 55   55   353 315  
Capital expenditures 385   398   822 804  
Total assets 18,173       18,173   17,184
Baltimore Gas and Electric Company | Operating Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 71   63   138 125  
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 3   2   5 4  
Pepco Holdings LLC | Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 1,712   1,579   3,742 3,357  
Operating and maintenance 337   291   702 586  
Depreciation and amortization 245   233   491 467  
Taxes, Miscellaneous 145   136   296 276  
Gain on sale of assets 0   (2)   0 (1)  
Interest Expense, 107   102   213 201  
Other, net (20)   (17)   (39) (35)  
Income taxes 32   42   79 99  
Net income (loss) attributable to common shareholders 109   143   278 337  
Capital expenditures 504   595   1,062 1,108  
Total assets 30,008       30,008   29,715
Pepco Holdings LLC | Operating Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 58   49   118 103  
Interest expense to affiliates, net 1   1   2 2  
Pepco Holdings LLC | Intersegment Eliminations | Related Party              
Segment Reporting [Line Items]              
Operating revenues from affiliates 2   2   5 5  
Potomac Electric Power Company | Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 859   776   1,849 1,635  
Operating and maintenance 118   91   270 187  
Depreciation and amortization 114   107   228 212  
Taxes, Miscellaneous 113   109   231 222  
Gain on sale of assets 0   (2)   0 (1)  
Interest Expense, 56   54   111 106  
Other, net (12)   (9)   (23) (20)  
Income taxes 17   22   33 48  
Net income (loss) attributable to common shareholders 65   84   133 181  
Capital expenditures 232   229   517 469  
Total assets 12,951       12,951   12,728
Potomac Electric Power Company | Operating Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 72   64   139 126  
Interest expense to affiliates, net 0   0   0 0  
Potomac Electric Power Company | Intersegment Eliminations | Related Party              
Segment Reporting [Line Items]              
Operating revenues from affiliates 1   1   4 4  
Delmarva Power and Light Company | Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 454   421   1,076 969  
Operating and maintenance 62   50   134 110  
Depreciation and amortization 67   63   133 126  
Taxes, Miscellaneous 24   20   50 41  
Gain on sale of assets 0   0   0 0  
Interest Expense, 26   25   53 50  
Other, net (4)   (4)   (8) (8)  
Income taxes 8   11   31 32  
Net income (loss) attributable to common shareholders 26   39   103 108  
Capital expenditures 153   121   300 277  
Total assets 6,824       6,824   6,789
Delmarva Power and Light Company | Operating Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 50   45   97 91  
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 2   2   4 4  
Atlantic City Electric Company | Operating Segment              
Segment Reporting [Line Items]              
Total operating revenues 401   384   822 757  
Operating and maintenance 55   55   105 106  
Depreciation and amortization 63   62   128 127  
Taxes, Miscellaneous 3   3   5 5  
Gain on sale of assets 0   0   0 0  
Interest Expense, 22   20   44 41  
Other, net (3)   (2)   (5) (6)  
Income taxes 8   9   17 20  
Net income (loss) attributable to common shareholders 22   24   49 56  
Capital expenditures 118   91   240 196  
Total assets 5,795       5,795   5,632
Atlantic City Electric Company | Operating Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 44   40   87 79  
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   0   2 1  
Corporate and Other | Corporate, Non-Segment              
Segment Reporting [Line Items]              
Total operating revenues 471   468   959 934  
Operating and maintenance 430   477   878 904  
Depreciation and amortization 16   16   28 32  
Taxes, Miscellaneous 13   11   27 20  
Gain on sale of assets 0   0   0 0  
Interest Expense, 183   176   363 337  
Other, net (5)   (8)   (6) (19)  
Income taxes (41)   (43)   (82) (78)  
Net income (loss) attributable to common shareholders (136)   (171)   (272) (284)  
Capital expenditures 30   13   39 26  
Total assets 6,086       6,086   6,170
Corporate and Other | Corporate, Non-Segment | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Total operating revenues 120   111   229 217  
Operating and maintenance 102   95   193 183  
Depreciation and amortization 1   1   2 2  
Taxes, Miscellaneous 5   4   10 8  
Gain on sale of assets 0   0   0 0  
Interest Expense, 3   3   5 4  
Other, net (1)   (2)   (3) (1)  
Income taxes (1)   0   (2) (1)  
Net income (loss) attributable to common shareholders (4)   (4)   (7) (8)  
Capital expenditures 1   154   5 166  
Total assets 4,586       4,586   $ 4,602
Corporate and Other | Corporate, Non-Segment | Related Party              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 11   10   23 22  
Interest expense to affiliates, net 0   0   0 0  
Corporate and Other | Corporate, Non-Segment | Related Party | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Operating and maintenance from affiliates 14   13   29 28  
Interest expense to affiliates, net 1   1   2 2  
Corporate and Other | Intersegment Eliminations | Related Party              
Segment Reporting [Line Items]              
Operating revenues from affiliates 469   466   954 929  
Corporate and Other | Intersegment Eliminations | Related Party | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Operating revenues from affiliates 119   111   229 217  
Rate-regulated electric revenues              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 5,710   5,365   11,868 11,182  
Purchased power and/or fuel 2,132   1,811   4,515 3,995  
Rate-regulated electric revenues | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 1,694   1,573   3,628 3,264  
Purchased power and/or fuel 679   590   1,529 1,273  
Rate-regulated electric revenues | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 5,639   5,096   11,773 10,804  
Purchased power and/or fuel 2,132   1,811   4,515 3,995  
Rate-regulated electric revenues | Intersegment Eliminations              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues (7)   (13)   (23) (26)  
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 (4)   (4)   (10) (9)  
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 1,985   1,836   3,898 3,901  
Purchased power and/or fuel 579   550   1,031 1,239  
Rate-regulated electric revenues | PECO Energy Co | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 941   880   2,023 1,836  
Purchased power and/or fuel 352   304   803 665  
Rate-regulated electric revenues | Baltimore Gas and Electric Company | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 1,050   849   2,295 1,861  
Purchased power and/or fuel 522   367   1,152 818  
Rate-regulated electric revenues | Pepco Holdings LLC | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 1,670   1,544   3,580 3,232  
Purchased power and/or fuel 679   590   1,529 1,273  
Rate-regulated electric revenues | Potomac Electric Power Company | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 859   776   1,849 1,635  
Purchased power and/or fuel 316   256   727 574  
Rate-regulated electric revenues | Delmarva Power and Light Company | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 414   388   919 849  
Purchased power and/or fuel 176   161   410 370  
Rate-regulated electric revenues | Atlantic City Electric Company | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 401   384   822 757  
Purchased power and/or fuel 187   173   392 329  
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 327   337   1,443 1,361  
Purchased power and/or fuel 79   85   472 423  
Rate-regulated natural gas revenues | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 40   33   157 120  
Purchased power and/or fuel 19   11   73 49  
Rate-regulated natural gas revenues | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 328   331   1,436 1,337  
Purchased power and/or fuel 79   85   472 423  
Rate-regulated natural gas revenues | Intersegment Eliminations              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues (1)   (2)   (3) (2)  
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 121   120   531 497  
Purchased power and/or fuel 37   35   198 176  
Rate-regulated natural gas revenues | Baltimore Gas and Electric Company | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 168   180   751 722  
Purchased power and/or fuel 23   39   201 198  
Rate-regulated natural gas revenues | Pepco Holdings LLC | Operating Segment              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues 40   33   157 120  
Purchased power and/or fuel 19   11   73 49  
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   33   157 120  
Purchased power and/or fuel 19   11   73 49  
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 (473)   (470)   (964) (939)  
Shared service and other revenues | Intersegment Eliminations | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues (118)   (109)   (224) (212)  
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 2   2   5 5  
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 471   468   959 934  
Shared service and other revenues | Corporate and Other | Corporate, Non-Segment | Pepco Holdings LLC              
Segment Reporting [Line Items]              
Electric and natural gas operating revenues $ 120   $ 111   $ 229 $ 217