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Segment Information (All Registrants)
 9 Months Ended
Sep. 30, 2021
Segment Reporting [Abstract]  
Segment Information (All Registrants) Segment Information (All Registrants)
Operating segments for each of the Registrants are determined based on information used by the CODM in deciding how to evaluate performance and allocate resources at each of the Registrants.
Exelon has eleven reportable segments, which include Generation's five reportable segments consisting of the Mid-Atlantic, Midwest, New York, ERCOT, and all other power regions referred to collectively as “Other Power Regions” and ComEd, PECO, BGE, and PHI's three reportable segments consisting of Pepco, DPL, and ACE. ComEd, PECO, BGE, Pepco, DPL, and ACE each represent a single reportable segment, and as such, no separate segment information is provided for these Registrants. Exelon, ComEd, PECO, BGE, Pepco, DPL, and ACE's CODMs evaluate the performance of and allocate resources to ComEd, PECO, BGE, Pepco, DPL, and ACE based on net income.
The basis for Generation's reportable segments is the integrated management of its electricity business that is located in different geographic regions, and largely representative of the footprints of ISO/RTO and/or NERC regions, which utilize multiple supply sources to provide electricity through various distribution channels (wholesale and retail). Generation's hedging strategies and risk metrics are also aligned to these same geographic regions. Descriptions of each of Generation’s five reportable segments are as follows:
•Mid-Atlantic represents operations in the eastern half of PJM, which includes New Jersey, Maryland, Virginia, West Virginia, Delaware, the District of Columbia, and parts of Pennsylvania and North Carolina.
•Midwest represents operations in the western half of PJM and the United States footprint of MISO, excluding MISO’s Southern Region.
•New York represents operations within NYISO.
•ERCOT represents operations within Electric Reliability Council of Texas.
•Other Power Regions:
•New England represents the operations within ISO-NE.
•South represents operations in the FRCC, MISO’s Southern Region, and the remaining portions of the SERC not included within MISO or PJM.
•West represents operations in the WECC, which includes CAISO.
•Canada represents operations across the entire country of Canada and includes AESO, OIESO, and the Canadian portion of MISO.
The CODMs for Exelon and Generation evaluate the performance of Generation’s electric business activities and allocate resources based on Revenues Net of Purchased Power and Fuel Expense (RNF). Generation believes that RNF is a useful measurement of operational performance. RNF is not a presentation defined under GAAP and may not be comparable to other companies’ presentations or deemed more useful than the GAAP information provided elsewhere in this report. Generation’s operating revenues include all sales to third parties and affiliated sales to the Utility Registrants. Purchased power costs include all costs associated with the procurement and supply of electricity including capacity, energy, and ancillary services. Fuel expense includes the fuel costs for Generation’s owned generation and fuel costs associated with tolling agreements. The results of Generation's other business activities are not regularly reviewed by the CODM and are therefore not classified as operating segments or included in the regional reportable segment amounts. These activities include natural gas, as well as other miscellaneous business activities that are not significant to Generation's overall operating revenues or results of operations. Further, Generation’s unrealized mark-to-market gains and losses on economic hedging activities and its amortization of certain intangible assets and liabilities relating to commodity contracts recorded at fair value from mergers and acquisitions are also excluded from the regional reportable segment amounts. Exelon and Generation do not use a measure of total assets in making decisions regarding allocating resources to or assessing the performance of these reportable segments.
An analysis and reconciliation of the Registrants’ reportable segment information to the respective information in the consolidated financial statements for the three and nine months ended September 30, 2021 and 2020 is as follows:
Three Months Ended September 30, 2021 and 2020
GenerationComEdPECOBGEPHI
Other(a)
Intersegment
Eliminations		Exelon
Operating revenues(b):
2021
Competitive businesses electric revenues$4,330 $— $— $— $— $— $(319)$4,011 
Competitive businesses natural gas revenues575 — — — — — — 575 
Competitive businesses other revenues(499)— — — — — (3)(502)
Rate-regulated electric revenues— 1,789 762 677 1,444 — (15)4,657 
Rate-regulated natural gas revenues— — 56 93 23 — (3)169 
Shared service and other revenues— — — — 3 534 (537)— 
Total operating revenues$4,406 $1,789 $818 $770 $1,470 $534 $(877)$8,910 
2020
Competitive businesses electric revenues$4,201 $— $— $— $— $— $(326)$3,875 
Competitive businesses natural gas revenues323 — — — — — — 323 
Competitive businesses other revenues135 — — — — — (3)132 
Rate-regulated electric revenues— 1,643 759 646 1,339 — (22)4,365 
Rate-regulated natural gas revenues— — 54 85 23 — (3)159 
Shared service and other revenues— — — — 6 484 (491)(1)
Total operating revenues$4,659 $1,643 $813 $731 $1,368 $484 $(845)$8,853 
GenerationComEdPECOBGEPHI
Other(a)
Intersegment
Eliminations		Exelon
Intersegment revenues(c):
2021$324 $9 $2 $7 $3 $531 $(876)$— 
2020331 15 3 6 6 485 (845)1 
Depreciation and amortization:
2021$866 $304 $86 $142 $210 $16 $— $1,624 
2020558 294 85 133 200 19 — 1,289 
Operating expenses:
2021$3,465 $1,428 $677 $709 $1,155 $541 $(858)$7,117 
20204,727 1,302 658 642 1,102 489 (833)8,087 
Interest expense, net:
2021$77 $98 $40 $36 $67 $79 $— $397 
202080 95 39 34 67 89 — 404 
Income (loss) before income taxes:
2021$814 $276 $108 $32 $264 $(88)$— $1,406 
2020219 256 122 61 215 (87)— 786 
Income Taxes:
2021$177 $56 $(3)$(4)$(2)$(50)$— $174 
2020100 60 (16)8 (1)65 — 216 
Net income (loss):
2021$633 $220 $111 $36 $266 $(37)$— $1,229 
2020117 196 138 53 216 (151)— 569 
Capital Expenditures:
2021$367 $561 $301 $287 $410 $4 $— $1,930 
2020282 554 312 290 386 9 — 1,833 
(a)Other primarily includes Exelon’s corporate operations, shared service entities, and other financing and investment activities.
(b)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 18 — Supplemental Financial Information for additional information on total utility taxes.
(c)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 accounting guidance. For Exelon, these amounts are included in Operating revenues in the Consolidated Statements of Operations and Comprehensive Income. See Note 19— Related Party Transactions for additional information on intersegment revenues.
PHI:
PepcoDPLACE
Other(a)
Intersegment
Eliminations		PHI
Operating revenues(b):
2021
Rate-regulated electric revenues$660 $337 $451 $— $(4)$1,444 
Rate-regulated natural gas revenues— 23 — — — 23 
Shared service and other revenues— — — 92 (89)3 
Total operating revenues$660 $360 $451 $92 $(93)$1,470 
2020
Rate-regulated electric revenues$611 $314 $420 $— $(6)$1,339 
Rate-regulated natural gas revenues— 23 — — — 23 
Shared service and other revenues— — — 91 (85)6 
Total operating revenues$611 $337 $420 $91 $(91)$1,368 
Intersegment revenues(c):
2021$2 $2 $1 $91 $(93)$3 
20203 3 1 90 (91)6 
Depreciation and amortization:
2021$104 $53 $46 $7 $— $210 
202096 48 48 8 — 200 
Operating expenses:
2021$501 $295 $359 $93 $(93)$1,155 
2020465 296 338 94 (91)1,102 
Interest expense, net:
2021$35 $15 $14 $3 $— $67 
202035 15 15 2 — 67 
Income (loss) before income taxes:
2021$136 $53 $79 $(4)$— $264 
2020121 28 68 (2)— 215 
Income Taxes:
2021$6 $3 $(11)$— $— $(2)
20203 1 (7)2 — (1)
Net income (loss):
2021$130 $50 $90 $(4)$— $266 
2020118 27 75 (4)— 216 
Capital Expenditures:
2021$202 $109 $97 $2 $— $410 
2020188 94 103 1 — 386 
__________
(a)Other primarily includes PHI’s corporate operations, shared service entities, and other financing and investment activities.
(b)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 18 — Supplemental Financial Information for additional information on total utility taxes.
(c)Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon.


The following tables disaggregate the Registrants' revenue recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For Generation, the disaggregation of revenues reflects Generation’s two primary products of power sales and natural gas sales, with further disaggregation of power sales provided by geographic region. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of rate-regulated
electric sales and rate-regulated natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with Generation and the Utility Registrants, but exclude any intercompany revenues.
Competitive Business Revenues (Generation):
Three Months Ended September 30, 2021
Revenues from external customers(a)
Intersegment
Revenues		Total
Revenues
Contracts with customers
Other(b)
Total
Mid-Atlantic$1,145 $123 $1,268 $4 $1,272 
Midwest1,084 (99)985 — 985 
New York445 10 455 — 455 
ERCOT191 165 356 2 358 
Other Power Regions948 318 1,266 (6)1,260 
Total Competitive Businesses Electric Revenues 3,813 517 4,330 — 4,330 
Competitive Businesses Natural Gas Revenues266 309 575 — 575 
Competitive Businesses Other Revenues(c)
95 (594)(499)— (499)
Total Generation Consolidated Operating Revenues$4,174 $232 $4,406 $— $4,406 
Three Months Ended September 30, 2020
Revenues from external customers(a)
Intersegment
revenues		Total
Revenues
Contracts with customers
Other(b)
Total
Mid-Atlantic$1,327 $(20)$1,307 $6 $1,313 
Midwest974 68 1,042 1 1,043 
New York401 5 406 — 406 
ERCOT249 74 323 7 330 
Other Power Regions937 186 1,123 (14)1,109 
Total Competitive Businesses Electric Revenues 3,888 313 4,201 — 4,201 
Competitive Businesses Natural Gas Revenues169 154 323 — 323 
Competitive Businesses Other Revenues(c)
85 50 135 — 135 
Total Generation Consolidated Operating Revenues$4,142 $517 $4,659 $— $4,659 
__________
(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 unrealized mark-to-market losses of $635 million and gains of $37 million in 2021 and 2020, respectively, and elimination of intersegment revenues.
Revenues net of purchased power and fuel expense (Generation):
Three Months Ended September 30, 2021Three Months Ended September 30, 2020
RNF
from external
customers(a)
Intersegment
RNF		Total RNF
RNF
from external
customers(a)
Intersegment
RNF		Total RNF
Mid-Atlantic$567 $3 $570 $586 $5 $591 
Midwest655 — 655 748 2 750 
New York343 3 346 281 4 285 
ERCOT181 (2)179 141 6 147 
Other Power Regions233 (22)211 253 (28)225 
Total RNF for Reportable Segments1,979 (18)1,961 2,009 (11)1,998 
Other(b)
881 18 899 336 11 347 
Total Generation RNF$2,860 $— $2,860 $2,345 $— $2,345 
__________
(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:
•unrealized mark-to-market gains of $754 million and gains of $255 million in 2021 and 2020, respectively;
•accelerated nuclear fuel amortization associated with announced early plant retirements as discussed in Note 7 — Early Plant Retirements of $42 million and $24 million in 2021 and 2020 respectively; and
•the elimination of intersegment RNF.
Electric and Gas Revenue by Customer Class (Utility Registrants):
Three Months Ended September 30, 2021
Revenues from contracts with customersComEdPECOBGEPHIPepcoDPLACE
Rate-regulated electric revenues
Residential$978 $509 $383 $782 $309 $198 $275 
Small commercial & industrial433 113 73 150 36 53 61 
Large commercial & industrial148 67 128 320 244 27 49 
Public authorities & electric railroads11 7 7 15 8 4 3 
Other(a)
245 61 104 172 53 56 63 
Total rate-regulated electric revenues(b)
$1,815 $757 $695 $1,439 $650 $338 $451 
Rate-regulated natural gas revenues
Residential$— $36 $57 $10 $— $10 $— 
Small commercial & industrial— 13 10 5 — 5 — 
Large commercial & industrial— — 22 2 — 2 — 
Transportation— 5 — 3 — 3 — 
Other(c)
— 2 6 3 — 3 — 
Total rate-regulated natural gas revenues(d)
$— $56 $95 $23 $— $23 $— 
Total rate-regulated revenues from contracts with customers$1,815 $813 $790 $1,462 $650 $361 $451 
Other revenues
Revenues from alternative revenue programs$(32)$3 $(24)$6 $9 $(2)$— 
Other rate-regulated electric revenues(e)
6 2 3 2 1 1 — 
Other rate-regulated natural gas revenues(e)
— — 1 — — — — 
Total other revenues$(26)$5 $(20)$8 $10 $(1)$— 
Total rate-regulated revenues for reportable segments$1,789 $818 $770 $1,470 $660 $360 $451 
Three Months Ended September 30, 2020
Revenues from contracts with customersComEdPECOBGEPHIPepcoDPLACE
Rate-regulated electric revenues
Residential$920 $518 $389 $763 $307 $193 $263 
Small commercial & industrial379 104 65 134 36 45 53 
Large commercial & industrial135 66 113 262 195 21 46 
Public authorities & electric railroads10 7 7 14 8 3 3 
Other(a)
234 58 78 141 47 44 50 
Total rate-regulated electric revenues(b)
$1,678 $753 $652 $1,314 $593 $306 $415 
Rate-regulated natural gas revenues
Residential$— $32 $55 $11 $— $11 $— 
Small commercial & industrial— 16 9 6 — 6 — 
Large commercial & industrial— — 21 1 — 1 — 
Transportation— 6 — 3 — 3 — 
Other(c)
— 1 3 2 — 2 — 
Total rate-regulated natural gas revenues(d)
$— $55 $88 $23 $— $23 $— 
Total rate-regulated revenues from contracts with customers$1,678 $808 $740 $1,337 $593 $329 $415 
Other revenues
Revenues from alternative revenue programs$(38)$5 $(9)$31 $18 $8 $5 
Other rate-regulated electric revenues(e)
3 — — — — — — 
Other rate-regulated natural gas revenues(e)
— — — — — — — 
Total other revenues$(35)$5 $(9)$31 $18 $8 $5 
Total rate-regulated revenues for reportable segments$1,643 $813 $731 $1,368 $611 $337 $420 

__________
(a)Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue.
(b)Includes operating revenues from affiliates in 2021 and 2020 respectively of:
•$9 million, $15 million at ComEd
•$2 million, $3 million at PECO
•$4 million, $3 million at BGE
•$3 million, $6 million at PHI
•$2 million, $3 million at Pepco
•$2 million, $3 million at DPL
•$1 million, $1 million at ACE
(c)Includes revenues from off-system natural gas sales.
(d)Includes operating revenues from affiliates in 2021 and 2020 respectively of:
•less than $1 million at PECO both 2021 and 2020
•$3 million, $3 million at BGE
(e)Includes late payment charge revenues.


Nine Months Ended September 30, 2021 and 2020
GenerationComEdPECOBGEPHI
Other(a)
Intersegment
Eliminations		Exelon
Operating revenues(b):
2021
Competitive businesses electric revenues$12,264 $— $— $— $— $— $(860)$11,404 
GenerationComEdPECOBGEPHI
Other(a)
Intersegment
Eliminations		Exelon
Competitive businesses natural gas revenues2,408 — — — — — — 2,408 
Competitive businesses other revenues(555)— — — — — (9)(564)
Rate-regulated electric revenues— 4,840 2,033 1,866 3,726 — (33)12,432 
Rate-regulated natural gas revenues— — 366 560 118 — (9)1,035 
Shared service and other revenues— — — — 10 1,549 (1,559)— 
Total operating revenues$14,117 $4,840 $2,399 $2,426 $3,854 $1,549 $(2,470)$26,715 
2020
Competitive businesses electric revenues$11,367 $— $— $— $— $— $(920)$10,447 
Competitive businesses natural gas revenues1,348 — — — — — (3)1,345 
Competitive businesses other revenues557 — — — — — (5)552 
Rate-regulated electric revenues— 4,499 1,948 1,763 3,425 — (50)11,585 
Rate-regulated natural gas revenues— — 358 521 116 — (5)990 
Shared service and other revenues— — — — 13 1,440 (1,447)6 
Total operating revenues$13,272 $4,499 $2,306 $2,284 $3,554 $1,440 $(2,430)$24,925 
Intersegment revenues(c):
2021$872 $19 $6 $20 $10 $1,542 $(2,469)$— 
2020932 31 7 16 13 1,435 (2,430)4 
Depreciation and amortization:
2021$2,735 $893 $259 $434 $614 $52 $1 $4,988 
20201,161 841 259 405 585 61 — 3,312 
Operating expenses:
2021$14,605 $3,833 $1,908 $2,080 $3,167 $1,572 $(2,407)$24,758 
202012,674 3,798 1,900 1,903 3,057 1,452 (2,397)22,387 
Interest expense, net:
2021$225 $292 $119 $103 $201 $241 $(1)$1,180 
2020277 287 108 99 201 269 — 1,241 
GenerationComEdPECOBGEPHI
Other(a)
Intersegment
Eliminations		Exelon
Income (loss) before income taxes:
2021$(8)$750 $392 $266 $538 $(264)$1 $1,675 
2020532 446 310 299 340 (262)— 1,665 
Income Taxes:
2021$108 $141 $9 $(24)$3 $(8)$— $229 
202041 142 (7)26 (77)16 — 141 
Net income (loss):
2021$(122)$609 $383 $290 $535 $(255)$1 $1,441 
2020485 304 317 273 418 (278)— 1,519 
Capital Expenditures:
2021$1,086 $1,723 $878 $907 $1,299 $77 $— $5,970 
20201,212 1,583 824 838 1,072 77 — 5,606 
Total assets:
September 30, 2021$48,010 $36,002 $13,733 $12,197 $24,502 $8,387 $(10,210)$132,621 
December 31, 202048,094 34,466 12,531 11,650 23,736 9,005 (10,165)129,317 
__________
(a)Other primarily includes Exelon’s corporate operations, shared service entities, and other financing and investment activities.
(b)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 18 — Supplemental Financial Information for additional information on total utility taxes.
(c)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 accounting guidance. For Exelon, these amounts are included in Operating revenues in the Consolidated Statements of Operations and Comprehensive Income. See Note 19 — Related Party Transactions for additional information on intersegment revenues.
PHI:
PepcoDPLACE
Other(a)
Intersegment
Eliminations		PHI
Operating revenues(b):
2021
Rate-regulated electric revenues$1,736 $922 $1,080 $— $(12)$3,726 
Rate-regulated natural gas revenues— 118 — — — 118 
Shared service and other revenues— — — 281 (271)10 
Total operating revenues$1,736 $1,040 $1,080 $281 $(283)$3,854 
2020
Rate-regulated electric revenues$1,650 $838 $952 $— $(15)$3,425 
Rate-regulated natural gas revenues— 116 — — — 116 
Shared service and other revenues— — — 279 (266)13 
Total operating revenues$1,650 $954 $952 $279 $(281)$3,554 
Intersegment revenues(c):
2021$4 $6 $2 $281 $(283)$10 
20206 7 3 278 (281)13 
Depreciation and amortization:
2021$302 $157 $133 $22 $— $614 
2020282 143 134 26 — 585 
Operating expenses:
2021$1,396 $858 $911 $285 $(283)$3,167 
20201,364 843 847 284 (281)3,057 
Interest expense, net:
2021$104 $47 $43 $7 $— $201 
2020103 47 45 6 — 201 
Income (loss) before income taxes:
2021$273 $144 $129 $(8)$— $538 
2020211 71 67 (9)— 340 
Income Taxes:
2021$9 $9 $(12)$(3)$— $3 
2020(16)(20)(39)(2)— (77)
Net income (loss):
2021$264 $135 $141 $(5)$— $535 
2020227 91 106 (6)— 418 
Capital Expenditures:
2021$641 $320 $336 $2 $— $1,299 
2020512 278 281 1 — 1,072 
Total assets:
September 30, 2021$9,748 $5,295 $4,532 $4,977 $(50)$24,502 
December 31, 20209,264 5,140 4,286 5,079 (33)23,736 
__________
(a)Other primarily includes PHI’s corporate operations, shared service entities, and other financing and investment activities.
(b)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 18 — Supplemental Financial Information for additional information on total utility taxes.
(c)Includes intersegment revenues with ComEd, BGE, and PECO, which are eliminated at Exelon.

The following tables disaggregate the Registrants' revenue recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. For Generation, the disaggregation of revenues reflects Generation’s two primary products of power sales and natural gas sales, with further disaggregation of power sales provided by geographic region. For the Utility Registrants, the disaggregation of revenues reflects the two primary utility services of rate-regulated
electric sales and rate-regulated natural gas sales (where applicable), with further disaggregation of these tariff sales provided by major customer groups. Exelon’s disaggregated revenues are consistent with Generation and the Utility Registrants, but exclude any intercompany revenues.
Competitive Business Revenues (Generation):
Nine Months Ended September 30, 2021
Revenues from external customers(a)
Intersegment
Revenues		Total
Revenues
Contracts with customers
Other(b)
Total
Mid-Atlantic$3,377 $134 $3,511 $16 $3,527 
Midwest3,067 (123)2,944 1 2,945 
New York1,204 (30)1,174 (1)1,173 
ERCOT724 155 879 11 890 
Other Power Regions3,043 713 3,756 (27)3,729 
Total Competitive Businesses Electric Revenues 11,415 849 12,264 — 12,264 
Competitive Businesses Natural Gas Revenues1,384 1,024 2,408 — 2,408 
Competitive Businesses Other Revenues(c)
291 (846)(555)— (555)
Total Generation Consolidated Operating Revenues$13,090 $1,027 $14,117 $— $14,117 
Nine Months Ended September 30, 2020
Revenues from external customers(a)
Intersegment
revenues		Total
Revenues
Contracts with customers
Other(b)
Total
Mid-Atlantic$3,692 $(152)$3,540 $21 $3,561 
Midwest2,773 240 3,013 (6)3,007 
New York1,074 (12)1,062 (1)1,061 
ERCOT579 155 734 20 754 
Other Power Regions2,718 300 3,018 (34)2,984 
Total Competitive Businesses Electric Revenues 10,836 531 11,367 — 11,367 
Competitive Businesses Natural Gas Revenues881 467 1,348 — 1,348 
Competitive Businesses Other Revenues(c)
268 289 557 — 557 
Total Generation Consolidated Operating Revenues$11,985 $1,287 $13,272 $— $13,272 
__________
(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 unrealized mark-to-market losses of $958 million and gains of $238 million in 2021 and 2020, respectively, and elimination of intersegment revenues.
Revenues net of purchased power and fuel expense (Generation):
Nine Months Ended September 30, 2021Nine Months Ended September 30, 2020
RNF
from external
customers(a)
Intersegment
RNF		Total RNF
RNF
from external
customers(a)
Intersegment
RNF		Total RNF
Mid-Atlantic$1,698 $14 $1,712 $1,660 $23 $1,683 
Midwest2,014 1 2,015 2,180 (2)2,178 
New York873 7 880 714 11 725 
ERCOT(775)(147)(922)311 14 325 
Other Power Regions641 (77)564 608 (70)538 
Total RNF for Reportable Segments4,451 (202)4,249 5,473 (24)5,449 
Other(b)
1,563 202 1,765 838 24 862 
Total Generation RNF$6,014 $— $6,014 $6,311 $— $6,311 
__________
(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. Primarily includes:
•unrealized mark-to-market gains of $1,242 million and gains of $472 million in 2021 and 2020, respectively;
•accelerated nuclear fuel amortization associated with announced early plant retirements as discussed in Note 7 — Early Plant Retirements of $148 million and $24 million in 2021 and 2020 respectively; and
• the elimination of intersegment RNF.
Electric and Gas Revenue by Customer Class (Utility Registrants):
Nine Months Ended September 30, 2021
Revenues from contracts with customersComEdPECOBGEPHIPepcoDPLACE
Rate-regulated electric revenues
Residential$2,479 $1,325 $1,044 $1,924 $785 $535 $604 
Small commercial & industrial1,176 312 202 392 101 145 146 
Large commercial & industrial420 183 342 825 616 70 139 
Public authorities & electric railroads33 24 20 45 24 11 10 
Other(a)
676 167 269 453 154 143 158 
Total rate-regulated electric revenues(b)
$4,784 $2,011 $1,877 $3,639 $1,680 $904 $1,057 
Rate-regulated natural gas revenues
Residential$— $251 $354 $67 $— $67 $— 
Small commercial & industrial— 94 59 29 — 29 — 
Large commercial & industrial— — 103 5 — 5 — 
Transportation— 17 — 11 — 11 — 
Other(c)
— 4 41 6 — 6 — 
Total rate-regulated natural gas revenues(d)
$— $366 $557 $118 $— $118 $— 
Total rate-regulated revenues from contracts with customers$4,784 $2,377 $2,434 $3,757 $1,680 $1,022 $1,057 
Other revenues
Revenues from alternative revenue programs$32 $20 $(17)$94 $54 $17 $23 
Other rate-regulated electric revenues(e)
24 2 7 3 2 1 — 
Other rate-regulated natural gas revenues(e)
— — 2 — — — — 
Total other revenues$56 $22 $(8)$97 $56 $18 $23 
Total rate-regulated revenues for reportable segments$4,840 $2,399 $2,426 $3,854 $1,736 $1,040 $1,080 
Nine Months Ended September 30, 2020
Revenues from contracts with customersComEdPECOBGEPHIPepcoDPLACE
Rate-regulated electric revenues
Residential$2,389 $1,277 $1,034 $1,825 $779 $501 $545 
Small commercial & industrial1,067 291 183 355 101 127 127 
Large commercial & industrial388 174 311 755 558 66 131 
Public authorities & electric railroads33 21 20 45 25 10 10 
Other(a)
663 171 233 471 166 148 159 
Total rate-regulated electric revenues(b)
$4,540 $1,934 $1,781 $3,451 $1,629 $852 $972 
Rate-regulated natural gas revenues
Residential$— $252 $342 $68 $— $68 $— 
Small commercial & industrial— 86 55 30 — 30 — 
Large commercial & industrial— — 96 3 — 3 — 
Transportation— 18 — 10 — 10 — 
Other(c)
— 3 16 5 — 5 — 
Total rate-regulated natural gas revenues(d)
$— $359 $509 $116 $— $116 $— 
Total rate-regulated revenues from contracts with customers$4,540 $2,293 $2,290 $3,567 $1,629 $968 $972 
Other revenues
Revenues from alternative revenue programs$(51)$10 $(10)$(15)$20 $(15)$(20)
Other rate-regulated electric revenues(e)
10 3 3 2 1 1 — 
Other rate-regulated natural gas revenues(e)
— — 1 — — — — 
Total other revenues$(41)$13 $(6)$(13)$21 $(14)$(20)
Total rate-regulated revenues for reportable segments$4,499 $2,306 $2,284 $3,554 $1,650 $954 $952 
__________
(a)Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue.
(b)Includes operating revenues from affiliates in 2021 and 2020 respectively of:
•$19 million, $31 million at ComEd
•$5 million, $6 million at PECO
•$10 million, $9 million at BGE
•$10 million, $13 million at PHI
•$4 million, $6 million at Pepco
•$6 million, $7 million at DPL
•$2 million, $3 million at ACE
(c)Includes revenues from off-system natural gas sales.
(d)Includes operating revenues from affiliates in 2021 and 2020 respectively of:
•$1 million, $1 million at PECO
•$10 million, $7 million at BGE
(e)Includes late payment charge revenues.