Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

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

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(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.