Segment Information (All Registrants)

Operating segments for each of the Registrants are determined based on information used by the chief operating decision maker(s) (CODM) in deciding how to evaluate performance and allocate resources at each of the Registrants.

Exelon has twelve reportable segments, which include ComEd, PECO, BGE, PHI's three reportable segments consisting of Pepco, DPL and ACE, and Generation’s six reportable segments consisting of the Mid-Atlantic, Midwest, New England, New York, ERCOT and all other power regions referred to collectively as “Other Power Regions”, which includes activities in the South, West and Canada. 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 and return on equity.

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 six 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, which includes portions of Illinois, Pennsylvania, Indiana, Ohio, Michigan, Kentucky and Tennessee, and the United States footprint of MISO, excluding MISO’s Southern Region, which covers all or most of North Dakota, South Dakota, Nebraska, Minnesota, Iowa, Wisconsin, the remaining parts of Illinois, Indiana, Michigan and Ohio not covered by PJM, and parts of Montana, Missouri and Kentucky.


•	New England represents the operations within ISO-NE covering the states of Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont.


•	New York represents operations within ISO-NY, which covers the state of New York in its entirety.


•	ERCOT represents operations within Electric Reliability Council of Texas, covering most of the state of Texas.


•	Other Power Regions:

•

South represents operations in the FRCC, MISO’s Southern Region, and the remaining portions of the SERC not included within MISO or PJM, which includes all or most of Florida, Arkansas, Louisiana, Mississippi, Alabama, Georgia, Tennessee, North Carolina, South Carolina and parts of Missouri, Kentucky and Texas. Generation’s South region also includes operations in the SPP, covering Kansas, Oklahoma, most of Nebraska and parts of New Mexico, Texas, Louisiana, Missouri, Mississippi and Arkansas.


•	West represents operations in the WECC, which includes California ISO, and covers the states of California, Oregon, Washington, Arizona, Nevada, Utah, Idaho, Colorado and parts of New Mexico, Wyoming and South Dakota.


•	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 six months ended June 30, 2018 and 2017 is as follows:

Three Months Ended June 30, 2018 and 2017



	Generation^(a)			ComEd		PECO		BGE		PHI		Other^(b)			Intersegment Eliminations			Exelon
Operating revenues^(c):
2018
Competitive businesses electric revenues	$	3,939		$	—	—		$	—	$	—	$	—		$	(270	)	$	3,669
Competitive businesses natural gas revenues	489			—		—		—		—		—			—			489
Competitive businesses other revenues	151			—		—		—		—		—			(4		)	147
Rate-regulated electric revenues	—			1,398		560		548		1,045		—			(9		)	3,542
Rate-regulated natural gas revenues	—			—		93		114		28		—			(5		)	230
Shared service and other revenues	—			—		—		—		3		487			(491		)	(1		)
Total operating revenues	$	4,579		$	1,398	$	653	$	662	$	1,076	$	487		$	(779	)	$	8,076
2017
Competitive businesses electric revenues	$	3,759		$	—	$	—	$	—	$	—	$	—		$	(266	)	$	3,493
Competitive businesses natural gas revenues	430			—		—		—		—		—			—			430
Competitive businesses other revenues	27			—		—		—		—		—			—			27
Rate-regulated electric revenues	—			1,357		550		571		1,040		—			(7		)	3,511
Rate-regulated natural gas revenues	—			—		80		103		22		—			(1		)	204
Shared service and other revenues	—			—		—		—		12		449			(461		)	—
Total operating revenues	$	4,216		$	1,357	$	630	$	674	$	1,074	$	449		$	(735	)	$	7,665
Intersegment revenues^(d):
2018	$	273		$	5	$	2	$	6	$	3	$	487		$	(776	)	$	—
2017	266			3		2		3		12		448			(734		)	—
Net income (loss):
2018	$	181		$	164	$	96	$	51	$	84	$	(34	)	$	—		$	542
2017	(236		)	118		88		45		66		13			—			94
Total assets:
June 30, 2018	$	47,668		$	30,446	$	10,345	$	9,241	$	21,766	$	8,438		$	(10,655	)	$	117,249
December 31, 2017	48,457			29,726		10,170		9,104		21,247		8,618			(10,552		)	116,770

__________

(a)

Generation includes the six reportable segments shown below: Mid-Atlantic, Midwest, New England, New York, ERCOT and Other Power Regions. Intersegment revenues for Generation for the three months ended June 30, 2018 include revenue from sales to PECO of $25 million, sales to BGE of $63 million, sales to Pepco of $46 million, sales to DPL of $30 million and sales to ACE of $6 million in the Mid-Atlantic region, and sales to ComEd of $103 million in the Midwest region, which eliminate upon consolidation. For the three months ended June 30, 2017, intersegment revenues for Generation include revenue from sales to PECO of $34 million, sales to BGE of $99 million, sales to Pepco of $68 million, sales to DPL of $40 million and sales to ACE of $7 million in the Mid-Atlantic region, and sales to ComEd of $18 million in the Midwest region, which eliminate upon consolidation.


(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 on the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 18 — Supplemental Financial Information for total utility taxes for the three months ended June 30, 2018 and 2017.

(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 accounting guidance. For Exelon, these amounts are included in Operating revenues in the Consolidated Statements of Operations and Comprehensive Income.

PHI:



	Pepco		DPL		ACE		Other^(b)			Intersegment Eliminations			PHI
Operating revenues^(a):
Three Months Ended June 30, 2018
Rate-regulated electric revenues	$	523	$	261	$	265	$	—		$	(4	)	$	1,045
Rate-regulated natural gas revenues	—		28		—		—			—			28
Shared service and other revenues	—		—		—		108			(105		)	3
Total operating revenues	$	523	$	289	$	265	$	108		$	(109	)	$	1,076
Three Months Ended June 30, 2017
Rate-regulated electric revenues	$	514	$	260	$	270	$	—		$	(4	)	$	1,040
Rate-regulated natural gas revenues	—		22		—		—			—			22
Shared service and other revenues	—		—		—		13			(1		)	12
Total operating revenues	$	514	$	282	$	270	$	13		$	(5	)	$	1,074
Intersegment revenues:
Three Months Ended June 30, 2018	$	2	$	2	$	1	$	107		$	(109	)	$	3
Three Months Ended June 30, 2017	1		2		1		13			(5		)	12
Net income (loss):
Three Months Ended June 30, 2018	$	54	$	26	$	8	$	(7	)	$	3		$	84
Three Months Ended June 30, 2017	43		19		8		(16		)	12			66
Total assets:
June 30, 2018	$	8,123	$	4,562	$	3,619	$	10,713		$	(5,251	)	$	21,766
December 31, 2017	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 on the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 18 — Supplemental Financial Information for total utility taxes for the three months ended June 30, 2018 and 2017.


(b)	Other primarily includes PHI’s corporate operations, shared service entities and other financing and investment activities.

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 three months ended June 30, 2018 and 2017. 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 June 30, 2018
	Revenues from external parties^(a)							Intersegment revenues			Total Revenues
	Contracts with customers		Other^(b)			Total		Intersegment revenues			Total Revenues
Mid-Atlantic	$	1,220	$	58		$	1,278	$	4		$	1,282
Midwest	1,062		73			1,135		(5		)	1,130
New England	551		(14		)	537		(3		)	534
New York	392		(2		)	390		2			392
ERCOT	165		111			276		1			277
Other Power Regions	210		113			323		(36		)	287
Total Competitive Businesses Electric Revenues	3,600		339			3,939		(37		)	3,902
Competitive Businesses Natural Gas Revenues	295		194			489		37			526
Competitive Businesses Other Revenues^(c)	125		26			151		—			151
Total Generation Consolidated Operating Revenues	$	4,020	$	559		$	4,579	$	—		$	4,579



	Three Months Ended June 30, 2017
	Revenues from external customers^(a)							Intersegment revenues			Total Revenues
	Contracts with customers		Other^(b)			Total		Intersegment revenues			Total Revenues
Mid-Atlantic	$	1,368	$	(12	)	$	1,356	$	9		$	1,365
Midwest	986		72			1,058		(8		)	1,050
New England	462		(24		)	438		(5		)	433
New York	405		(13		)	392		(5		)	387
ERCOT	186		61			247		—			247
Other Power Regions	142		126			268		(9		)	259
Total Competitive Businesses Electric Revenues	3,549		210			3,759		(18		)	3,741
Competitive Businesses Natural Gas Revenues	244		186			430		19			449
Competitive Businesses Other Revenues^(c)	179		(152		)	27		(1		)	26
Total Generation Consolidated Operating Revenues	$	3,972	$	244		$	4,216	$	—		$	4,216

__________


(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 $15 million decrease to revenues for the amortization of intangible assets and liabilities related to commodity contracts recorded at fair value for the three months ended June 30, 2017, unrealized mark-to-market losses of $5 million and $143 million for the three months ended June 30, 2018 and 2017, respectively, and elimination of intersegment revenues.

Revenues net of purchased power and fuel expense (Generation):



	Three Months Ended June 30, 2018							Three Months Ended June 30, 2017
	RNF from external customers^(a)		Intersegment RNF			Total RNF		RNF from external customers^(a)			Intersegment RNF			Total RNF
Mid-Atlantic	$	722	$	13		$	735	$	757		$	26		$	783
Midwest	770		2			772		728			—			728
New England	104		(8		)	96		157			(10		)	147
New York	259		7			266		270			—			270
ERCOT	129		(47		)	82		121			(51		)	70
Other Power Regions	125		(35		)	90		134			(44		)	90
Total Revenues net of purchased power and fuel for Reportable Segments	2,109		(68		)	2,041		2,167			(79		)	2,088
Other^(b)	190		68			258		(108		)	79			(29		)
Total Generation Revenues net of purchased power and fuel expense	$	2,299	$	—		$	2,299	$	2,059		$	—		$	2,059

__________


(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 $20 million decrease to RNF for the amortization of intangible assets and liabilities related to commodity contracts for the three months ended June 30, 2017, unrealized mark-to-market gains of $90 million and losses of $184 million for the three months ended June 30, 2018 and 2017, respectively, accelerated nuclear fuel amortization associated with announced early plant retirements as discussed in Note 8 - Early Plant Retirements of $20 million decrease and $2 million decrease to revenue net of purchased power and fuel expense for the three months ended June 30, 2018, and 2017, respectively, and the elimination of intersegment revenue net of purchased power and fuel expense.

Electric and Gas Revenue by Customer Class (ComEd, PECO, BGE, PHI, PECO, DPL and ACE):



	Three Months Ended June 30, 2018
Revenues from contracts with customers	ComEd			PECO		BGE			PHI			Pepco			DPL		ACE
Rate-regulated electric revenues
Residential	$	699		$	338	$	295		$	505		$	228		$	142	$	135
Small commercial & industrial	357			97		60			115			33			44		38
Large commercial & industrial	127			52		101			282			212			25		45
Public authorities & electric railroads	12			6		7			16			9			3		4
Other^(a)	213			60		78			133			49			41		44
Total rate-regulated electric revenues^(b)	1,408			553		541			1,051			531			255		266
Rate-regulated natural gas revenues
Residential	—			62		74			13			—			13		—
Small commercial & industrial	—			25		13			8			—			8		—
Large commercial & industrial	—			—		23			1			—			1		—
Transportation	—			5		—			4			—			4		—
Other^(c)	—			1		12			2			—			2		—
Total rate-regulated natural gas revenues^(d)	—			93		122			28			—			28		—
Total rate-regulated revenues from contracts with customers	1,408			646		663			1,079			531			283		266

Other revenues
Revenues from alternative revenue programs	(17		)	2		(4		)	(7		)	(10		)	4		(1		)
Other rate-regulated electric revenues^(e)	7			5		3			4			2			2		—
Other rate-regulated natural gas revenues^(e)	—			—		—			—			—			—		—
Total other revenues	(10		)	7		(1		)	(3		)	(8		)	6		(1		)
Total rate-regulated revenues for reportable segments	$	1,398		$	653	$	662		$	1,076		$	523		$	289	$	265



	Three Months Ended June 30, 2017
Revenues from contracts with customers	ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Rate-regulated electric revenues
Residential	$	644	$	331	$	300	$	498	$	223	$	145	$	130
Small commercial & industrial	340		100		58		119		34		45		40
Large commercial & industrial	119		57		107		268		193		26		49
Public authorities & electric railroads	11		8		8		16		8		4		4
Other^(a)	217		51		71		129		49		39		44
Total rate-regulated electric revenues^(b)	1,331		547		544		1,030		507		259		267
Rate-regulated natural gas revenues
Residential	—		50		60		10		—		10		—
Small commercial & industrial	—		22		12		5		—		5		—
Large commercial & industrial	—		—		19		2		—		2		—
Transportation	—		5		—		2		—		2		—
Other^(c)	—		3		4		3		—		3		—
Total rate-regulated natural gas revenues^(d)	—		80		95		22		—		22		—
Total rate-regulated revenues from contracts with customers	1,331		627		639		1,052		507		281		267

Other revenues
Revenues from alternative revenue programs	18		—		32		8		5		—		3
Other rate-regulated electric revenues^(e)	8		3		2		3		2		1		—
Other rate-regulated natural gas revenues^(e)	—		—		1		—		—		—		—
Other revenues^(f)	—		—		—		11		—		—		—
Total other revenues	26		3		35		22		7		1		3
Total rate-regulated revenues for reportable segments	$	1,357	$	630	$	674	$	1,074	$	514	$	282	$	270

__________


(a)	Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue.

(b)

Includes operating revenues from affiliates of $5 million, $2 million, $2 million, $3 million, $2 million, $2 million and $1 million at ComEd, PECO, BGE, PHI, Pepco, DPL and ACE, respectively, for the three months ended June 30, 2018 and $3 million, $2 million, $1 million, $1 million $1 million, $2 million and $1 million at ComEd, PECO, BGE, PHI, Pepco, DPL and ACE, respectively, for the three months ended June 30, 2017.


(c)	Includes revenues from off-system natural gas sales.


(d)	Includes operating revenues from affiliates of less than $1 million and $4 million at PECO and BGE, respectively, for the three months ended June 30, 2018 and less than $1 million and $2 million at PECO and BGE, respectively, for the three months ended June 30, 2017.


(e)	Includes late payment charge revenues.


(f)	Includes operating revenues from affiliates of $11 million at PHI for the three months ended June 30, 2017.

Six Months Ended June 30, 2018 and 2017



	Generation^(a)		ComEd		PECO		BGE		PHI		Other^(b)			Intersegment Eliminations			Exelon
Operating revenues^(c):
2018
Competitive businesses electric revenues	$	8,448	$	—	$	—	$	—	$	—	$	—		$	(663	)	$	7,785
Competitive businesses natural gas revenues	1,444		—		—		—		—		—			(8		)	1,436
Competitive businesses other revenues	198		—		—		—		—		—			(2		)	196
Rate-regulated electric revenues	—		2,910		1,193		1,206		2,214		—			(27		)	7,496
Rate-regulated natural gas revenues	—		—		325		433		106		—			(9		)	855
Shared service and other revenues	—		—		—		—		7		940			(946		)	1
Total operating revenues	$	10,090	$	2,910	$	1,518	$	1,639	$	2,327	$	940		$	(1,655	)	$	17,769
2017
Competitive businesses electric revenues	$	7,467	$	—	$	—	$	—	$	—	$	—		$	(592	)	$	6,875
Competitive businesses natural gas revenues	1,348		—		—		—		—		—			—			1,348
Competitive businesses other revenues	278		—		—		—		—		—			(1		)	277
Rate-regulated electric revenues	—		2,656		1,140		1,237		2,138		1			(16		)	7,156
Rate-regulated natural gas revenues	—		—		286		388		87		—			(4		)	757
Shared service and other revenues	—		—		—		—		23		870			(893		)	—
Total operating revenues	$	9,093	$	2,656	$	1,426	$	1,625	$	2,248	$	871		$	(1,506	)	$	16,413
Intersegment revenues^(d):
2018	$	672	$	19	$	3	$	12	$	7	$	937		$	(1,650	)	$	—
2017	594		9		3		8		23		866			(1,503		)	—
Net income (loss):
2018	$	368	$	329	$	210	$	179	$	149	$	(56	)	$	—		$	1,179
2017	164		259		215		169		205		54			—			1,066

__________

(a)

Generation includes the six reportable segments shown below: Mid-Atlantic, Midwest, New England, New York, ERCOT and Other Power Regions. Intersegment revenues for Generation for the six months ended June 30, 2018 include revenue from sales to PECO of $61 million, sales to BGE of $128 million, sales to Pepco of $98 million, sales to DPL of $76 million and sales to ACE of $12 million in the Mid-Atlantic region, and sales to ComEd of $297 million in the Midwest region, which eliminate upon consolidation. For the six months ended June 30, 2017, intersegment revenues for Generation include revenue from sales to PECO of $79 million, sales to BGE of $233 million, sales to Pepco of $152 million, sales to DPL of $91 million and sales to ACE of $16 million in the Mid-Atlantic region, and sales to ComEd of $23 million in the Midwest region, which eliminate upon consolidation.


(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 on the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 18 — Supplemental Financial Information for total utility taxes for the six months ended June 30, 2018 and 2017.

(d)

PHI:



	Pepco		DPL		ACE		Other^(b)			Intersegment Eliminations			PHI
Operating revenues^(a):
Six Months Ended June 30, 2018
Rate-regulated electric revenues	$	1,080	$	567	$	575	$	—		$	(8	)	$	2,214
Rate-regulated natural gas revenues	—		106		—		—			—			106
Shared service and other revenues	—		—		—		221			(214		)	7
Total operating revenues	$	1,080	$	673	$	575	$	221		$	(222	)	$	2,327
Six Months Ended June 30, 2017
Rate-regulated electric revenues	$	1,045	$	557	$	544	$	1		$	(9	)	$	2,138
Rate-regulated natural gas revenues	—		87		—		—			—			87
Shared service and other revenues	—		—		—		25			(2		)	23
Total operating revenues	$	1,045	$	644	$	544	$	26		$	(11	)	$	2,248
Intersegment revenues:
Six Months Ended June 30, 2018	$	3	$	4	$	2	$	220		$	(222	)	$	7
Six Months Ended June 30, 2017	3		4		1		24			(9		)	23
Net income (loss):
Six Months Ended June 30, 2018	$	85	$	57	$	15	$	(15	)	$	7		$	149
Six Months Ended June 30, 2017	101		76		36		(31		)	23			205

__________


(a)	Includes gross utility tax receipts from customers. The offsetting remittance of utility taxes to the governing bodies is recorded in expenses on the Registrants’ Consolidated Statements of Operations and Comprehensive Income. See Note 18 — Supplemental Financial Information for total utility taxes for the six months ended June 30, 2018 and 2017.


(b)	Other primarily includes PHI’s corporate operations, shared service entities and other financing and investment activities.

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 six months ended June 30, 2018 and 2017. 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):



	Six Months Ended June 30, 2018
	Revenues from external parties^(a)							Intersegment Revenues			Total Revenues
	Contracts with customers		Other^(b)			Total		Intersegment Revenues			Total Revenues
Mid-Atlantic	$	2,574	$	138		$	2,712	$	10		$	2,722
Midwest	2,336		143			2,479		(4		)	2,475
New England	1,276		54			1,330		(4		)	1,326
New York	831		(31		)	800		1			801
ERCOT	315		169			484		2			486
Other Power Regions	420		223			643		(67		)	576
Total Competitive Businesses Electric Revenues	7,752		696			8,448		(62		)	8,386
Competitive Businesses Natural Gas Revenues	816		628			1,444		62			1,506
Competitive Businesses Other Revenues^(c)	258		(60		)	198		—			198
Total Generation Consolidated Operating Revenues	$	8,826	$	1,264		$	10,090	$	—		$	10,090



	Six Months Ended June 30, 2017
	Revenues from external customers^(a)							Intersegment revenues			Total Revenues
	Contracts with customers		Other^(b)			Total		Intersegment revenues			Total Revenues
Mid-Atlantic	$	2,862	$	(77	)	$	2,785	$	5		$	2,790
Midwest	1,964		143			2,107		(5		)	2,102
New England	1,051		(64		)	987		(7		)	980
New York	708		(16		)	692		(8		)	684
ERCOT	354		85			439		(1		)	438
Other Power Regions	270		187			457		(14		)	443
Total Competitive Businesses Electric Revenues	7,209		258			7,467		(30		)	7,437
Competitive Businesses Natural Gas Revenues	1,012		336			1,348		31			1,379
Competitive Businesses Other Revenues^(c)	386		(108		)	278		(1		)	277
Total Generation Consolidated Operating Revenues	$	8,607	$	486		$	9,093	$	—		$	9,093

__________


(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 $17 million decrease to revenues for the amortization of intangible assets and liabilities related to commodity contracts recorded at fair value for the six months ended June 30, 2017, unrealized mark-to-market losses of $102 million and $98 million for the six months ended June 30, 2018 and 2017, respectively, and elimination of intersegment revenues.

Revenues net of purchased power and fuel expense (Generation):



	Six Months Ended June 30, 2018							Six Months Ended June 30, 2017
	RNF from external customers^(a)		Intersegment RNF			Total RNF		RNF from external customers^(a)		Intersegment RNF			Total RNF
Mid-Atlantic	$	1,558	$	28		$	1,586	$	1,513	$	44		$	1,557
Midwest	1,617		14			1,631		1,431		12			1,443
New England	227		(11		)	216		271		(14		)	257
New York	541		8			549		415		—			415
ERCOT	235		(117		)	118		214		(76		)	138
Other Power Regions	284		(76		)	208		240		(88		)	152
Total Revenues net of purchased power and fuel expense for Reportable Segments	4,462		(154		)	4,308		4,084		(122		)	3,962
Other^(b)	55		154			209		54		122			176
Total Generation Revenues net of purchased power and fuel expense	$	4,517	$	—		$	4,517	$	4,138	$	—		$	4,138

__________


(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 $22 million decrease to RNF for the amortization of intangible assets and liabilities related to commodity contracts for the six months ended June 30, 2017, unrealized mark-to-market losses of $175 million and $233 million for the six months ended June 30, 2018 and 2017, respectively, accelerated nuclear fuel amortization associated with announced early plant retirements as discussed in Note 8 - Early Plant Retirements of $34 million decrease to revenue net of purchased power and fuel expense for the six months ended June 30, 2018, and the elimination of intersegment revenue net of purchased power and fuel expense.

Electric and Gas Revenue by Customer Class (ComEd, PECO, BGE, PHI, PECO, DPL and ACE):



	Six Months Ended June 30, 2018
Revenues from contracts with customers	ComEd			PECO		BGE			PHI		Pepco		DPL		ACE
Rate-regulated electric revenues
Residential	$	1,416		$	741	$	688		$	1,114	$	486	$	333	$	295
Small commercial & industrial	741			198		128			230		65		90		75
Large commercial & industrial	280			110		207			541		402		48		91
Public authorities & electric railroads	25			14		14			30		16		7		7
Other^(a)	444			122		156			289		98		82		110
Total rate-regulated electric revenues^(b)	2,906			1,185		1,193			2,204		1,067		560		578
Rate-regulated natural gas revenues
Residential	—			223		298			60		—		60		—
Small commercial & industrial	—			87		47			26		—		26		—
Large commercial & industrial	—			1		70			5		—		5		—
Transportation	—			11		—			9		—		9		—
Other^(c)	—			3		40			6		—		6		—
Total rate-regulated natural gas revenues^(d)	—			325		455			106		—		106		—
Total rate-regulated revenues from contracts with customers	2,906			1,510		1,648			2,310		1,067		666		578

Other revenues
Revenues from alternative revenue programs	(12		)	1		(17		)	12		10		5		(3		)
Other rate-regulated electric revenues^(e)	16			7		6			5		3		2		—
Other rate-regulated natural gas revenues^(e)	—			—		2			—		—		—		—
Total other revenues	4			8		(9		)	17		13		7		(3		)
Total rate-regulated revenues for reportable segments	$	2,910		$	1,518	$	1,639		$	2,327	$	1,080	$	673	$	575



	Six Months Ended June 30, 2017
Revenues from contracts with customers	ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Rate-regulated electric revenues
Residential	$	1,255	$	713	$	686	$	1,053	$	460	$	321	$	272
Small commercial & industrial	668		197		128		233		68		89		76
Large commercial & industrial	226		109		215		526		382		50		94
Public authorities & electric railroads	22		16		15		31		16		8		7
Other^(a)	437		99		138		253		96		78		86
Total rate-regulated electric revenues^(b)	2,608		1,134		1,182		2,096		1,022		546		535
Rate-regulated natural gas revenues
Residential	—		192		245		50		—		50		—
Small commercial & industrial	—		77		42		22		—		22		—
Large commercial & industrial	—		—		64		4		—		4		—
Transportation	—		11		—		7		—		7		—
Other^(c)	—		6		17		4		—		4		—
Total rate-regulated natural gas revenues^(d)	—		286		368		87		—		87		—
Total rate-regulated revenues from contracts with customers	2,608		1,420		1,550		2,183		1,022		633		535

Other revenues
Revenues from alternative revenue programs	32		—		66		38		20		9		9
Other rate-regulated electric revenues^(e)	16		6		7		5		3		2		—
Other rate-regulated natural gas revenues^(e)	—		—		2		—		—		—		—
Other revenues^(f)	—		—		—		22		—		—		—
Total other revenues	48		6		75		65		23		11		9
Total rate-regulated revenues for reportable segments	$	2,656	$	1,426	$	1,625	$	2,248	$	1,045	$	644	$	544

__________


(a)	Includes revenues from transmission revenue from PJM, wholesale electric revenue and mutual assistance revenue.

(b)

Includes operating revenues from affiliates of $19 million, $3 million, $3 million, $7 million, $3 million, $4 million and $2 million at ComEd, PECO, BGE, PHI, Pepco, DPL and ACE, respectively, for the six months ended June 30, 2018 and $9 million, $3 million, $3 million, $1 million, $3 million, $4 million and $1 million at ComEd, PECO, BGE, PHI, Pepco, DPL and ACE, respectively, for the six months ended June 30, 2017.


(c)	Includes revenues from off-system natural gas sales.


(d)	Includes operating revenues from affiliates of less than $1 million and $9 million at PECO and BGE, respectively, for the six months ended June 30, 2018 and less than $1 million and $5 million at PECO and BGE, respectively, for the six months ended June 30, 2017.


(e)	Includes late payment charge revenues.


(f)	Includes operating revenues from affiliates of $22 million at PHI for the six months ended June 30, 2017.