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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Segment Reporting [Abstract] |
Analysis and reconciliation of reportable segment information | An analysis and reconciliation of the Registrants’ reportable segment information to the respective information in the consolidated financial statements for the years ended December 31, 2018, 2017, and 2016 is as follows:
|  |  |  |  |  |  |  |  | Successor |  |  |  |  |  |
| Generation (a) |  | ComEd |  | PECO |  | BGE |  | PHI (e) |  | Other (b) |  | Intersegment Eliminations |  | Exelon
Operating revenues(c): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Competitive businesses electric revenues | $ | 17,411 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (1,256 | ) |  | $ | 16,155 |
Competitive businesses natural gas revenues | 2,718 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (8 | ) |  | 2,710 |
Competitive businesses other revenues | 308 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (5 | ) |  | 303 |
Rate-regulated electric revenues | — |  |  | 5,882 |  |  | 2,470 |  |  | 2,428 |  |  | 4,609 |  |  | — |  |  | (45 | ) |  | 15,344 |
Rate-regulated natural gas revenues | — |  |  | — |  |  | 568 |  |  | 741 |  |  | 181 |  |  | — |  |  | (20 | ) |  | 1,470 |
Shared service and other revenues | — |  |  | — |  |  | — |  |  | — |  |  | 15 |  |  | 1,948 |  |  | (1,960 | ) |  | 3 |
Total operating revenues | $ | 20,437 |  |  | $ | 5,882 |  |  | $ | 3,038 |  |  | $ | 3,169 |  |  | $ | 4,805 |  |  | $ | 1,948 |  |  | $ | (3,294 | ) |  | $ | 35,985 |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Competitive businesses electric revenues | $ | 15,332 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (1,105 | ) |  | $ | 14,227 |
Competitive businesses natural gas revenues | 2,575 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,575 |
Competitive businesses other revenues | 593 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1 | ) |  | 592 |
Rate-regulated electric revenues | — |  |  | 5,536 |  |  | 2,375 |  |  | 2,489 |  |  | 4,469 |  |  | — |  |  | (29 | ) |  | 14,840 |
Rate-regulated natural gas revenues | — |  |  | — |  |  | 495 |  |  | 687 |  |  | 161 |  |  | — |  |  | (10 | ) |  | 1,333 |
Shared service and other revenues | — |  |  | — |  |  | — |  |  | — |  |  | 49 |  |  | 1,831 |  |  | (1,880 | ) |  | — |
Total operating revenues | $ | 18,500 |  |  | $ | 5,536 |  |  | $ | 2,870 |  |  | $ | 3,176 |  |  | $ | 4,679 |  |  | $ | 1,831 |  |  | $ | (3,025 | ) |  | $ | 33,567 |
|  |  |  |  |  |  |  |  | Successor |  |  |  |  |  |
| Generation (a) |  | ComEd |  | PECO |  | BGE |  | PHI (e) |  | Other (b) |  | Intersegment Eliminations |  | Exelon
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Competitive businesses electric revenues | $ | 15,400 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (1,430 | ) |  | $ | 13,970 |
Competitive businesses natural gas revenues | 2,146 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,146 |
Competitive businesses other revenues | 211 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4 | ) |  | 207 |
Rate-regulated electric revenues | — |  |  | 5,254 |  |  | 2,531 |  |  | 2,609 |  |  | 3,506 |  |  | — |  |  | (31 | ) |  | 13,869 |
Rate-regulated natural gas revenues | — |  |  | — |  |  | 463 |  |  | 624 |  |  | 92 |  |  | — |  |  | (13 | ) |  | 1,166 |
Shared service and other revenues | — |  |  | — |  |  | — |  |  | — |  |  | 45 |  |  | 1,648 |  |  | (1,686 | ) |  | 7 |
Total operating revenues | $ | 17,757 |  |  | $ | 5,254 |  |  | $ | 2,994 |  |  | $ | 3,233 |  |  | $ | 3,643 |  |  | $ | 1,648 |  |  | $ | (3,164 | ) |  | $ | 31,365 |
Intersegment revenues(d): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 1,269 |  |  | $ | 27 |  |  | $ | 8 |  |  | $ | 29 |  |  | $ | 15 |  |  | $ | 1,942 |  |  | $ | (3,289 | ) |  | $ | 1 |
2017 | 1,110 |  |  | 15 |  |  | 7 |  |  | 16 |  |  | 50 |  |  | 1,824 |  |  | (3,020 | ) |  | 2 |
2016 | 1,428 |  |  | 15 |  |  | 8 |  |  | 21 |  |  | 45 |  |  | 1,647 |  |  | (3,159 | ) |  | 5 |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 1,797 |  |  | $ | 940 |  |  | $ | 301 |  |  | $ | 483 |  |  | $ | 740 |  |  | $ | 92 |  |  | $ | — |  |  | $ | 4,353 |
2017 | 1,457 |  |  | 850 |  |  | 286 |  |  | 473 |  |  | 675 |  |  | 87 |  |  | — |  |  | 3,828 |
2016 | 1,879 |  |  | 775 |  |  | 270 |  |  | 423 |  |  | 515 |  |  | 74 |  |  | — |  |  | 3,936 |
Operating expenses (c): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 19,510 |  |  | $ | 4,741 |  |  | $ | 2,452 |  |  | $ | 2,696 |  |  | $ | 4,156 |  |  | $ | 1,929 |  |  | $ | (3,341 | ) |  | $ | 32,143 |
2017 | 18,001 |  |  | 4,214 |  |  | 2,215 |  |  | 2,562 |  |  | 3,911 |  |  | 1,742 |  |  | (3,026 | ) |  | 29,619 |
2016 | 16,878 |  |  | 4,056 |  |  | 2,292 |  |  | 2,683 |  |  | 3,549 |  |  | 1,812 |  |  | (3,164 | ) |  | 28,106 |
Interest expense, net: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 432 |  |  | $ | 347 |  |  | $ | 129 |  |  | $ | 106 |  |  | $ | 261 |  |  | $ | 279 |  |  | $ | — |  |  | $ | 1,554 |
2017 | 440 |  |  | 361 |  |  | 126 |  |  | 105 |  |  | 245 |  |  | 283 |  |  | — |  |  | 1,560 |
2016 | 364 |  |  | 461 |  |  | 123 |  |  | 103 |  |  | 195 |  |  | 290 |  |  | — |  |  | 1,536 |
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 365 |  |  | $ | 832 |  |  | $ | 466 |  |  | $ | 387 |  |  | $ | 432 |  |  | $ | (249 | ) |  | $ | (1 | ) |  | $ | 2,232 |
2017 | 1,455 |  |  | 984 |  |  | 538 |  |  | 525 |  |  | 578 |  |  | (296 | ) |  | (2 | ) |  | 3,782 |
2016 | 857 |  |  | 679 |  |  | 587 |  |  | 468 |  |  | (58 | ) |  | (555 | ) |  | (5 | ) |  | 1,973 |
Income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | (108 | ) |  | $ | 168 |  |  | $ | 6 |  |  | $ | 74 |  |  | $ | 35 |  |  | $ | (55 | ) |  | $ | — |  |  | $ | 120 |
2017 | (1,376 | ) |  | 417 |  |  | 104 |  |  | 218 |  |  | 217 |  |  | 294 |  |  | — |  |  | (126 | )
2016 | 282 |  |  | 301 |  |  | 149 |  |  | 174 |  |  | 3 |  |  | (156 | ) |  | — |  |  | 753 |
|  |  |  |  |  |  |  |  | Successor |  |  |  |  |  |
| Generation (a) |  | ComEd |  | PECO |  | BGE |  | PHI (e) |  | Other (b) |  | Intersegment Eliminations |  | Exelon
Net income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 443 |  |  | $ | 664 |  |  | $ | 460 |  |  | $ | 313 |  |  | $ | 398 |  |  | $ | (193 | ) |  | $ | (1 | ) |  | $ | 2,084 |
2017 | 2,798 |  |  | 567 |  |  | 434 |  |  | 307 |  |  | 362 |  |  | (590 | ) |  | (2 | ) |  | 3,876 |
2016 | 550 |  |  | 378 |  |  | 438 |  |  | 294 |  |  | (61 | ) |  | (398 | ) |  | (5 | ) |  | 1,196 |
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 2,242 |  |  | $ | 2,126 |  |  | $ | 849 |  |  | $ | 959 |  |  | $ | 1,375 |  |  | $ | 43 |  |  | $ | — |  |  | $ | 7,594 |
2017 | $ | 2,259 |  |  | $ | 2,250 |  |  | $ | 732 |  |  | $ | 882 |  |  | $ | 1,396 |  |  | $ | 65 |  |  | $ | — |  |  | $ | 7,584 |
2016 | $ | 3,078 |  |  | $ | 2,734 |  |  | $ | 686 |  |  | $ | 934 |  |  | $ | 1,008 |  |  | $ | 113 |  |  | $ | — |  |  | $ | 8,553 |
Total assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | $ | 47,556 |  |  | $ | 31,213 |  |  | $ | 10,642 |  |  | $ | 9,716 |  |  | $ | 21,984 |  |  | $ | 8,355 |  |  | $ | (9,800 | ) |  | $ | 119,666 |
2017 | 48,457 |  |  | 29,726 |  |  | 10,170 |  |  | 9,104 |  |  | 21,247 |  |  | 8,618 |  |  | (10,552 | ) |  | 116,770 |
__________
(a) | See Note 25 — Related Party Transactions for additional information on intersegment revenues.
(b) | Other primarily includes Exelon’s corporate operations, shared service entities and other financing and investment activities.
(c) | Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in expenses in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 23 — Supplemental Financial Information for additional information on total utility taxes.
(d) | Intersegment revenues exclude sales to unconsolidated affiliates. The intersegment profit associated with Generation’s sale of certain products and services by and between Exelon’s segments is not eliminated in consolidation due to the recognition of intersegment profit in accordance with regulatory authoritative guidance. For Exelon, these amounts are included in Operating revenues in the Consolidated Statements of Operations and Comprehensive Income.
(e) | Amounts included represent activity for PHI's successor period, March 24, 2016 through December 31, 2018.
Successor and Predecessor PHI:
| Pepco |  | DPL |  | ACE |  | Other(b) |  | Intersegment Eliminations |  | PHI
Operating revenues(a): |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor |  |  |  |  |  |  |  |  |  |  |
Rate-regulated electric revenues | $ | 2,239 |  |  | $ | 1,151 |  |  | $ | 1,236 |  |  | $ | — |  |  | $ | (17 | ) |  | $ | 4,609 |
Rate-regulated natural gas revenues | — |  |  | 181 |  |  | — |  |  | — |  |  | — |  |  | 181 |
Shared service and other revenues | — |  |  | — |  |  | — |  |  | 435 |  |  | (420 | ) |  | 15 |
Total operating revenues | $ | 2,239 |  |  | $ | 1,332 |  |  | $ | 1,236 |  |  | $ | 435 |  |  | $ | (437 | ) |  | $ | 4,805 |
December 31, 2017 - Successor |  |  |  |  |  |  |  |  |  |  |
Rate-regulated electric revenues | $ | 2,158 |  |  | $ | 1,139 |  |  | $ | 1,186 |  |  | $ | — |  |  | $ | (14 | ) |  | $ | 4,469 |
Rate-regulated natural gas revenues | — |  |  | 161 |  |  | — |  |  | — |  |  | — |  |  | 161 |
Shared service and other revenues | — |  |  | — |  |  | — |  |  | 52 |  |  | (3 | ) |  | 49 |
Total operating revenues | $ | 2,158 |  |  | $ | 1,300 |  |  | $ | 1,186 |  |  | $ | 52 |  |  | $ | (17 | ) |  | $ | 4,679 |
March 24, 2016 to December 31, 2016 - Successor |  |  |  |  |  |  |  |  |  |  |
Rate-regulated electric revenues | $ | 1,675 |  |  | $ | 850 |  |  | $ | 989 |  |  | $ | 5 |  |  | $ | (13 | ) |  | $ | 3,506 |
Rate-regulated natural gas revenues | — |  |  | 92 |  |  | — |  |  | — |  |  | — |  |  | 92 |
Shared service and other revenues | — |  |  | — |  |  | — |  |  | 45 |  |  | — |  |  | 45 |
Total operating revenues | $ | 1,675 |  |  | $ | 942 |  |  | $ | 989 |  |  | $ | 50 |  |  | $ | (13 | ) |  | $ | 3,643 |
January 1, 2016 to March 23, 2016 - Predecessor |  |  |  |  |  |  |  |  |  |  |
Rate-regulated electric revenues | $ | 511 |  |  | $ | 279 |  |  | $ | 268 |  |  | $ | 42 |  |  | $ | (4 | ) |  | $ | 1,096 |
Rate-regulated natural gas revenues | — |  |  | 56 |  |  | — |  |  | 1 |  |  | — |  |  | 57 |
Shared service and other revenues | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total operating revenues | $ | 511 |  |  | $ | 335 |  |  | $ | 268 |  |  | $ | 43 |  |  | $ | (4 | ) |  | $ | 1,153 |
Intersegment revenues: |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 6 |  |  | $ | 8 |  |  | $ | 3 |  |  | $ | 435 |  |  | $ | (437 | ) |  | $ | 15 |
December 31, 2017 - Successor | 6 |  |  | 8 |  |  | 2 |  |  | 53 |  |  | (19 | ) |  | 50 |
March 24, 2016 to December 31, 2016 - Successor | 4 |  |  | 5 |  |  | 2 |  |  | 47 |  |  | (13 | ) |  | 45 |
January 1, 2016 to March 23, 2016 - Predecessor | 1 |  |  | 2 |  |  | 1 |  |  | — |  |  | (4 | ) |  | — |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 385 |  |  | $ | 182 |  |  | $ | 136 |  |  | $ | 37 |  |  | $ | — |  |  | $ | 740 |
December 31, 2017 - Successor | 321 |  |  | 167 |  |  | 146 |  |  | 42 |  |  | (1 | ) |  | $ | 675 |
March 24, 2016 to December 31, 2016 - Successor | 224 |  |  | 120 |  |  | 128 |  |  | 43 |  |  | — |  |  | $ | 515 |
January 1, 2016 to March 23, 2016 - Predecessor | 71 |  |  | 37 |  |  | 37 |  |  | 11 |  |  | (4 | ) |  | $ | 152 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 1,919 |  |  | $ | 1,143 |  |  | $ | 1,087 |  |  | $ | 442 |  |  | $ | (435 | ) |  | $ | 4,156 |
December 31, 2017 - Successor | 1,760 |  |  | 1,071 |  |  | 1,029 |  |  | 68 |  |  | (17 | ) |  | $ | 3,911 |
March 24, 2016 to December 31, 2016 - Successor | 1,577 |  |  | 952 |  |  | 1,000 |  |  | 33 |  |  | (13 | ) |  | $ | 3,549 |
January 1, 2016 to March 23, 2016 - Predecessor | 443 |  |  | 284 |  |  | 251 |  |  | 73 |  |  | (3 | ) |  | $ | 1,048 |
| Pepco |  | DPL |  | ACE |  | Other(b) |  | Intersegment Eliminations |  | PHI
Interest expense, net: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 128 |  |  | $ | 58 |  |  | $ | 64 |  |  | $ | 11 |  |  | $ | — |  |  | $ | 261 |
December 31, 2017 - Successor | 121 |  |  | 51 |  |  | 61 |  |  | 13 |  |  | (1 | ) |  | $ | 245 |
March 24, 2016 to December 31, 2016 - Successor | 98 |  |  | 38 |  |  | 47 |  |  | 12 |  |  | — |  |  | $ | 195 |
January 1, 2016 to March 23, 2016 - Predecessor | 29 |  |  | 12 |  |  | 15 |  |  | 11 |  |  | (2 | ) |  | $ | 65 |
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 223 |  |  | $ | 142 |  |  | $ | 87 |  |  | $ | 388 |  |  | $ | (408 | ) |  | $ | 432 |
December 31, 2017 - Successor | 310 |  |  | 192 |  |  | 103 |  |  | 377 |  |  | (404 | ) |  | $ | 578 |
March 24, 2016 to December 31, 2016 - Successor | 36 |  |  | (30 | ) |  | (51 | ) |  | (84 | ) |  | 71 |  |  | $ | (58 | )
January 1, 2016 to March 23, 2016 - Predecessor | 47 |  |  | 43 |  |  | 5 |  |  | 59 |  |  | (118 | ) |  | $ | 36 |
Income taxes: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 13 |  |  | $ | 22 |  |  | $ | 12 |  |  | $ | (10 | ) |  | $ | (2 | ) |  | $ | 35 |
December 31, 2017 - Successor | 105 |  |  | 71 |  |  | 26 |  |  | 15 |  |  | — |  |  | $ | 217 |
March 24, 2016 to December 31, 2016 - Successor | 26 |  |  | 5 |  |  | (5 | ) |  | (23 | ) |  | — |  |  | $ | 3 |
January 1, 2016 to March 23, 2016 - Predecessor | 15 |  |  | 17 |  |  | 1 |  |  | (16 | ) |  | — |  |  | $ | 17 |
Net income (loss): |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 210 |  |  | $ | 120 |  |  | $ | 75 |  |  | $ | (22 | ) |  | $ | 15 |  |  | $ | 398 |
December 31, 2017 - Successor | 205 |  |  | 121 |  |  | 77 |  |  | (91 | ) |  | 50 |  |  | $ | 362 |
March 24, 2016 to December 31, 2016 - Successor | 10 |  |  | (35 | ) |  | (47 | ) |  | (34 | ) |  | 45 |  |  | $ | (61 | )
January 1, 2016 to March 23, 2016 - Predecessor | 32 |  |  | 26 |  |  | 5 |  |  | (44 | ) |  | — |  |  | $ | 19 |
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 656 |  |  | $ | 364 |  |  | $ | 335 |  |  | $ | 20 |  |  | $ | — |  |  | $ | 1,375 |
December 31, 2017 - Successor | 628 |  |  | 428 |  |  | 312 |  |  | 28 |  |  | — |  |  | $ | 1,396 |
March 24, 2016 to December 31, 2016 - Successor | 489 |  |  | 277 |  |  | 218 |  |  | 24 |  |  | — |  |  | 1,008 |
January 1, 2016 to March 23, 2016 - Predecessor | 97 |  |  | 72 |  |  | 93 |  |  | 11 |  |  | — |  |  | 273 |
Total assets: |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 - Successor | $ | 8,299 |  |  | $ | 4,588 |  |  | $ | 3,699 |  |  | $ | 10,819 |  |  | $ | (5,421 | ) |  | $ | 21,984 |
December 31, 2017 - Successor | 7,832 |  |  | 4,357 |  |  | 3,445 |  |  | 10,600 |  |  | (4,987 | ) |  | 21,247 |
__________
(a) | Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in expenses in the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 23 — Supplemental Financial Information for additional information on total utility taxes.
(b) | Other primarily includes PHI’s corporate operations, shared service entities and other financing and investment activities. For the predecessor periods presented, Other includes the activity of PHI’s unregulated businesses which were distributed to Exelon and Generation as a result of the PHI Merger.
Analysis and reconciliation of reportable segment revenues for Generation | Competitive Business Revenues (Generation):
| 2018
| Revenues from external customers(a) |  |  |  |
| Contracts with customers |  | Other(b) |  | Total |  | Intersegment Revenues |  | Total Revenues
Mid-Atlantic | $ | 5,241 |  |  | $ | 233 |  |  | $ | 5,474 |  |  | $ | 13 |  |  | $ | 5,487 |
Midwest | 4,527 |  |  | 190 |  |  | 4,717 |  |  | (11 | ) |  | 4,706 |
New England | 2,660 |  |  | 185 |  |  | 2,845 |  |  | (4 | ) |  | 2,841 |
New York | 1,723 |  |  | (36 | ) |  | 1,687 |  |  | — |  |  | 1,687 |
ERCOT | 572 |  |  | 560 |  |  | 1,132 |  |  | 1 |  |  | 1,133 |
Other Power Regions | 870 |  |  | 686 |  |  | 1,556 |  |  | (62 | ) |  | 1,494 |
Total Competitive Businesses Electric Revenues | 15,593 |  |  | 1,818 |  |  | 17,411 |  |  | (63 | ) |  | 17,348 |
Competitive Businesses Natural Gas Revenues | 1,524 |  |  | 1,194 |  |  | 2,718 |  |  | 62 |  |  | 2,780 |
Competitive Businesses Other Revenues(c) | 510 |  |  | (202 | ) |  | 308 |  |  | 1 |  |  | 309 |
Total Generation Consolidated Operating Revenues | 17,627 |  |  | 2,810 |  |  | $ | 20,437 |  |  | $ | — |  |  | $ | 20,437 |
| 2017
| Revenues from external customers(a) |  |  |  |
| Contracts with customers |  | Other(b) |  | Total |  | Intersegment Revenues |  | Total Revenues
Mid-Atlantic | $ | 5,523 |  |  | $ | (8 | ) |  | $ | 5,515 |  |  | $ | 25 |  |  | $ | 5,540 |
Midwest | 3,923 |  |  | 283 |  |  | 4,206 |  |  | (25 | ) |  | 4,181 |
New England | 2,064 |  |  | (54 | ) |  | 2,010 |  |  | (8 | ) |  | 2,002 |
New York | 1,605 |  |  | (38 | ) |  | 1,567 |  |  | (17 | ) |  | 1,550 |
ERCOT | 641 |  |  | 317 |  |  | 958 |  |  | 4 |  |  | 962 |
Other Power Regions | 594 |  |  | 482 |  |  | 1,076 |  |  | (27 | ) |  | 1,049 |
Total Competitive Businesses Electric Revenues | 14,350 |  |  | 982 |  |  | 15,332 |  |  | (48 | ) |  | 15,284 |
Competitive Businesses Natural Gas Revenues | 1,658 |  |  | 917 |  |  | 2,575 |  |  | 53 |  |  | 2,628 |
Competitive Businesses Other Revenues(c) | 744 |  |  | (151 | ) |  | 593 |  |  | (5 | ) |  | 588 |
Total Generation Consolidated Operating Revenues | $ | 16,752 |  |  | $ | 1,748 |  |  | $ | 18,500 |  |  | $ | — |  |  | $ | 18,500 |
| 2016
| Revenues from external customers(a) |  |  |  |
| Contracts with customers |  | Other(b) |  | Total |  | Intersegment Revenues |  | Total Revenues
Mid-Atlantic | $ | 6,182 |  |  | $ | 30 |  |  | $ | 6,212 |  |  | $ | (33 | ) |  | $ | 6,179 |
Midwest | 4,007 |  |  | 395 |  |  | 4,402 |  |  | 10 |  |  | 4,412 |
New England | 1,953 |  |  | (175 | ) |  | 1,778 |  |  | (9 | ) |  | 1,769 |
New York | 1,198 |  |  | 10 |  |  | 1,208 |  |  | (42 | ) |  | 1,166 |
ERCOT | 810 |  |  | 21 |  |  | 831 |  |  | 6 |  |  | 837 |
Other Power Regions | 670 |  |  | 299 |  |  | 969 |  |  | (62 | ) |  | 907 |
Total Competitive Businesses Electric Revenues | 14,820 |  |  | 580 |  |  | 15,400 |  |  | (130 | ) |  | 15,270 |
Competitive Businesses Natural Gas Revenues | 1,953 |  |  | 193 |  |  | 2,146 |  |  | 135 |  |  | 2,281 |
Competitive Businesses Other Revenues(c) | 756 |  |  | (545 | ) |  | 211 |  |  | (5 | ) |  | 206 |
Total Generation Consolidated Operating Revenues | $ | 17,529 |  |  | $ | 228 |  |  | $ | 17,757 |  |  | $ | — |  |  | $ | 17,757 |
__________
(a) | Includes all wholesale and retail electric sales to third parties and affiliated sales to the Utility Registrants.
(b) | Includes revenues from derivatives and leases.
(c) | Other represents activities not allocated to a region. See text above for a description of included activities. Includes a $38 million and $52 million decrease to revenues for the amortization of intangible assets and liabilities related to commodity contracts recorded at fair value in 2017 and 2016, respectively, unrealized mark-to-market losses of $262 million, $131 million, and $500 million in 2018, 2017, and 2016, respectively, and elimination of intersegment revenues.
Revenues net of purchased power and fuel expense (Generation):
| 2018 |  | 2017 |  | 2016
| RNF from external customers(a) |  | Intersegment RNF |  | Total RNF |  | RNF from external customers(a) |  | Intersegment RNF |  | Total RNF |  | RNF from external customers(a) |  | Intersegment RNF |  | Total RNF
Mid-Atlantic | $ | 3,022 |  |  | $ | 51 |  |  | $ | 3,073 |  |  | $ | 3,105 |  |  | $ | 109 |  |  | $ | 3,214 |  |  | $ | 3,282 |  |  | $ | 35 |  |  | $ | 3,317 |
Midwest | 3,112 |  |  | 23 |  |  | 3,135 |  |  | 2,810 |  |  | 10 |  |  | 2,820 |  |  | 2,969 |  |  | 2 |  |  | 2,971 |
New England | 368 |  |  | (14 | ) |  | 354 |  |  | 538 |  |  | (24 | ) |  | 514 |  |  | 467 |  |  | (29 | ) |  | 438 |
New York | 1,112 |  |  | 10 |  |  | 1,122 |  |  | 1,007 |  |  | 1 |  |  | 1,008 |  |  | 771 |  |  | (19 | ) |  | 752 |
ERCOT | 501 |  |  | (243 | ) |  | 258 |  |  | 575 |  |  | (243 | ) |  | 332 |  |  | 412 |  |  | (131 | ) |  | 281 |
Other Power Regions | 515 |  |  | (140 | ) |  | 375 |  |  | 476 |  |  | (171 | ) |  | 305 |  |  | 483 |  |  | (147 | ) |  | 336 |
Total Revenues net of purchased power and fuel for Reportable Segments | $ | 8,630 |  |  | $ | (313 | ) |  | $ | 8,317 |  |  | $ | 8,511 |  |  | $ | (318 | ) |  | $ | 8,193 |  |  | $ | 8,384 |  |  | $ | (289 | ) |  | $ | 8,095 |
Other (b) | 114 |  |  | 313 |  |  | 427 |  |  | 299 |  |  | 318 |  |  | 617 |  |  | 543 |  |  | 289 |  |  | 832 |
Total Generation Revenues net of purchased power and fuel expense | $ | 8,744 |  |  | $ | — |  |  | $ | 8,744 |  |  | $ | 8,810 |  |  | $ | — |  |  | $ | 8,810 |  |  | $ | 8,927 |  |  | $ | — |  |  | $ | 8,927 |
__________
(a) | Includes purchases and sales from/to third parties and affiliated sales to the Utility Registrants.
(b) | Other represents activities not allocated to a region. See text above for a description of included activities. Includes a $54 million and $57 million decrease in RNF for the amortization of intangible assets and liabilities related to commodity contracts in 2017 and 2016, respectively, unrealized mark-to-market losses of $319 million, $175 million, and $41 million in 2018, 2017, and 2016, respectively, accelerated nuclear fuel amortization associated with the announced early plant retirements as discussed in Note 8 - Early Plant Retirements of $57 million, $12 million and $60 million for the year ended December 31, 2018, 2017, and 2016 and the elimination of intersegment RNF.
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] | Electric and Gas Revenue by Customer Class (Utility Registrants):
| 2018
|  |  |  |  |  |  | Successor |  |  |  |  |  |
Revenues from contracts with customers | ComEd |  | PECO |  | BGE |  | PHI |  | Pepco |  | DPL |  | ACE
Rate-regulated electric revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | $ | 2,942 |  |  | $ | 1,566 |  |  | $ | 1,382 |  |  | $ | 2,351 |  |  | $ | 1,021 |  |  | $ | 669 |  |  | $ | 661 |
Small commercial & industrial | 1,487 |  |  | 404 |  |  | 257 |  |  | 488 |  |  | 140 |  |  | 186 |  |  | 162 |
Large commercial & industrial | 538 |  |  | 223 |  |  | 429 |  |  | 1,124 |  |  | 846 |  |  | 100 |  |  | 178 |
Public authorities & electric railroads | 47 |  |  | 28 |  |  | 28 |  |  | 58 |  |  | 32 |  |  | 14 |  |  | 12 |
Other(a) | 867 |  |  | 243 |  |  | 327 |  |  | 593 |  |  | 193 |  |  | 175 |  |  | 227 |
Total rate-regulated electric revenues(b) | 5,881 |  |  | 2,464 |  |  | 2,423 |  |  | 4,614 |  |  | 2,232 |  |  | 1,144 |  |  | 1,240 |
Rate-regulated natural gas revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | — |  |  | 395 |  |  | 491 |  |  | 99 |  |  | — |  |  | 99 |  |  | — |
Small commercial & industrial | — |  |  | 143 |  |  | 77 |  |  | 44 |  |  | — |  |  | 44 |  |  | — |
Large commercial & industrial | — |  |  | 1 |  |  | 124 |  |  | 8 |  |  | — |  |  | 8 |  |  | — |
Transportation | — |  |  | 23 |  |  | — |  |  | 16 |  |  | — |  |  | 16 |  |  | — |
Other(c) | — |  |  | 6 |  |  | 63 |  |  | 13 |  |  | — |  |  | 13 |  |  | — |
Total rate-regulated natural gas revenues(d) | — |  |  | 568 |  |  | 755 |  |  | 180 |  |  | — |  |  | 180 |  |  | — |
Total rate-regulated revenues from contracts with customers | 5,881 |  |  | 3,032 |  |  | 3,178 |  |  | 4,794 |  |  | 2,232 |  |  | 1,324 |  |  | 1,240 |
Other revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from alternative revenue programs | (29 | ) |  | (7 | ) |  | (26 | ) |  | — |  |  | — |  |  | 4 |  |  | (4 | )
Other rate-regulated electric revenues(e) | 30 |  |  | 12 |  |  | 13 |  |  | 10 |  |  | 7 |  |  | 3 |  |  | — |
Other rate-regulated natural gas revenues(e) | — |  |  | 1 |  |  | 4 |  |  | 1 |  |  | — |  |  | 1 |  |  | — |
Total other revenues | 1 |  |  | 6 |  |  | (9 | ) |  | 11 |  |  | 7 |  |  | 8 |  |  | (4 | )
Total rate-regulated revenues for reportable segments | $ | 5,882 |  |  | $ | 3,038 |  |  | $ | 3,169 |  |  | $ | 4,805 |  |  | $ | 2,239 |  |  | $ | 1,332 |  |  | $ | 1,236 |
| 2017
|  |  |  |  |  |  | Successor |  |  |  |  |  |
Revenues from contracts with customers | ComEd |  | PECO |  | BGE |  | PHI |  | Pepco |  | DPL |  | ACE
Rate-regulated electric revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | $ | 2,715 |  |  | $ | 1,505 |  |  | $ | 1,365 |  |  | $ | 2,246 |  |  | $ | 964 |  |  | $ | 663 |  |  | $ | 619 |
Small commercial & industrial | 1,363 |  |  | 401 |  |  | 254 |  |  | 490 |  |  | 137 |  |  | 187 |  |  | 166 |
Large commercial & industrial | 455 |  |  | 223 |  |  | 427 |  |  | 1,086 |  |  | 794 |  |  | 103 |  |  | 189 |
Public authorities & electric railroads | 44 |  |  | 30 |  |  | 31 |  |  | 60 |  |  | 33 |  |  | 14 |  |  | 13 |
Other(a) | 886 |  |  | 204 |  |  | 299 |  |  | 541 |  |  | 199 |  |  | 163 |  |  | 191 |
Total rate-regulated electric revenues(b) | 5,463 |  |  | 2,363 |  |  | 2,376 |  |  | 4,423 |  |  | 2,127 |  |  | 1,130 |  |  | 1,178 |
Rate-regulated natural gas revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | — |  |  | 331 |  |  | 437 |  |  | 90 |  |  | — |  |  | 90 |  |  | — |
Small commercial & industrial | — |  |  | 131 |  |  | 75 |  |  | 38 |  |  | — |  |  | 38 |  |  | — |
Large commercial & industrial | — |  |  | 1 |  |  | 119 |  |  | 8 |  |  | — |  |  | 8 |  |  | — |
Transportation | — |  |  | 23 |  |  | — |  |  | 15 |  |  | — |  |  | 15 |  |  | — |
Other(c) | — |  |  | 8 |  |  | 28 |  |  | 9 |  |  | — |  |  | 9 |  |  | — |
Total rate-regulated natural gas revenues(d) | — |  |  | 494 |  |  | 659 |  |  | 160 |  |  | — |  |  | 160 |  |  | — |
Total rate-regulated revenues from contracts with customers | 5,463 |  |  | 2,857 |  |  | 3,035 |  |  | 4,583 |  |  | 2,127 |  |  | 1,290 |  |  | 1,178 |
Other revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from alternative revenue programs | 43 |  |  | — |  |  | 124 |  |  | 40 |  |  | 26 |  |  | 6 |  |  | 8 |
Other rate-regulated electric revenues(e) | 30 |  |  | 12 |  |  | 13 |  |  | 8 |  |  | 5 |  |  | 3 |  |  | — |
Other rate-regulated natural gas revenues(e) | — |  |  | 1 |  |  | 4 |  |  | 1 |  |  | — |  |  | 1 |  |  | — |
Other revenues(f) | — |  |  | — |  |  | — |  |  | 47 |  |  | — |  |  | — |  |  | — |
Total other revenues | 73 |  |  | 13 |  |  | 141 |  |  | 96 |  |  | 31 |  |  | 10 |  |  | 8 |
Total rate-regulated revenues for reportable segments | $ | 5,536 |  |  | $ | 2,870 |  |  | $ | 3,176 |  |  | $ | 4,679 |  |  | $ | 2,158 |  |  | $ | 1,300 |  |  | $ | 1,186 |
|  |  |  |  |  |  |  |  |  |  |  |  | Successor |  |  | Predecessor
| 2016 |  | March 24, 2016 to December 31, 2016 |  |  | January 1, 2016 to March 23, 2016
Revenues from contracts with customers | ComEd |  | PECO |  | BGE |  | Pepco |  | DPL |  | ACE |  | PHI |  |  | PHI
Rate-regulated electric revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | $ | 2,603 |  |  | $ | 1,631 |  |  | $ | 1,504 |  |  | $ | 1,004 |  |  | $ | 672 |  |  | $ | 664 |  |  | $ | 1,779 |  |  |  | $ | 561 |
Small commercial & industrial | 1,318 |  |  | 430 |  |  | 276 |  |  | 150 |  |  | 188 |  |  | 183 |  |  | 400 |  |  |  | 121 |
Large commercial & industrial | 462 |  |  | 234 |  |  | 434 |  |  | 790 |  |  | 99 |  |  | 201 |  |  | 835 |  |  |  | 255 |
Public authorities & electric railroads | 45 |  |  | 32 |  |  | 35 |  |  | 32 |  |  | 13 |  |  | 13 |  |  | 45 |  |  |  | 13 |
Other(a) | 820 |  |  | 192 |  |  | 276 |  |  | 190 |  |  | 160 |  |  | 187 |  |  | 400 |  |  |  | 169 |
Total rate-regulated electric revenues(b) | 5,248 |  |  | 2,519 |  |  | 2,525 |  |  | 2,166 |  |  | 1,132 |  |  | 1,248 |  |  | 3,459 |  |  |  | 1,119 |
Rate-regulated natural gas revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential | — |  |  | 309 |  |  | 432 |  |  | — |  |  | 86 |  |  | — |  |  | 50 |  |  |  | 36 |
Small commercial & industrial | — |  |  | 121 |  |  | 66 |  |  | — |  |  | 35 |  |  | — |  |  | 21 |  |  |  | 14 |
Large commercial & industrial | — |  |  | — |  |  | 114 |  |  | — |  |  | 6 |  |  | — |  |  | 4 |  |  |  | 2 |
Transportation | — |  |  | 24 |  |  | — |  |  | — |  |  | 13 |  |  | — |  |  | 10 |  |  |  | 3 |
Other(c) | — |  |  | 9 |  |  | 28 |  |  | — |  |  | 8 |  |  | — |  |  | 7 |  |  |  | 2 |
Total rate-regulated natural gas revenues(d) | — |  |  | 463 |  |  | 640 |  |  | — |  |  | 148 |  |  | — |  |  | 92 |  |  |  | 57 |
Total rate-regulated revenues from contracts with customers | 5,248 |  |  | 2,982 |  |  | 3,165 |  |  | 2,166 |  |  | 1,280 |  |  | 1,248 |  |  | 3,551 |  |  |  | 1,176 |
Other revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from alternative revenue programs | (24 | ) |  | — |  |  | 53 |  |  | 14 |  |  | (6 | ) |  | 9 |  |  | 43 |  |  |  | (26 | )
Other rate-regulated electric revenues(e) | 30 |  |  | 12 |  |  | 13 |  |  | 6 |  |  | 3 |  |  | — |  |  | 6 |  |  |  | 3 |
Other rate-regulated natural gas revenues(e) | — |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  | — |
Other revenues(f) | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 43 |  |  |  | — |
Total other revenues | 6 |  |  | 12 |  |  | 68 |  |  | 20 |  |  | (3 | ) |  | 9 |  |  | 92 |  |  |  | (23 | )
Total rate-regulated revenues for reportable segments | $ | 5,254 |  |  | $ | 2,994 |  |  | $ | 3,233 |  |  | $ | 2,186 |  |  | $ | 1,277 |  |  | $ | 1,257 |  |  | $ | 3,643 |  |  |  | $ | 1,153 |
__________
(a) | Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue.
(b) | Includes operating revenues from affiliates of $27 million, $7 million, $8 million, $15 million, $6 million, $8 million and $3 million at ComEd, PECO, BGE, PHI, Pepco, DPL and ACE, respectively, in 2018, $15 million, $6 million, $5 million, $3 million, $6 million, $8 million and $2 million at ComEd, PECO, BGE, PHI, Pepco, DPL and ACE, in 2017, and $15 million, $7 million, $7 million, $2 million, $5 million, $7 million and $3 million at ComEd, PECO, BGE, PHI, Pepco, DPL and ACE, respectively, in 2016.
(c) | Includes revenues from off-system natural gas sales.
(d) | Includes operating revenues from affiliates of $1 million and $21 million at PECO and BGE, respectively, in 2018, $1 million and $11 million at PECO and BGE, respectively, in 2017, and $1 million and $14 million at PECO and BGE, respectively, in 2016.
(e) | Includes late payment charge revenues.
(f) | Includes operating revenues from affiliates of $47 million and $43 million at PHI in 2017 and 2016, respectively.

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