Segment Information (Tables)

12 Months Ended

Dec. 31, 2013

Segment Reporting Information [Line Items]

Analysis and reconciliation of reportable segment information

												Intersegment
		Generation (a)		ComEd		PECO		BGE(b)		Other(c)		Eliminations		Exelon
Operating revenues^(d):
	2013	$	15,630	$	4,464	$	3,100	$	3,065	$	1,241	$	(2,612)	$	24,888
	2012		14,437		5,443		3,186		2,091		1,396		(3,064)		23,489
	2011		10,447		6,056		3,720		0		830		(1,990)		19,063
Intersegment revenues^(e):
	2013	$	1,367	$	3	$	1	$	13	$	1,237	$	(2,607)	$	14
	2012		1,660		2		3		9		1,381		(3,049)		6
	2011		1,161		2		5		0		831		(1,990)		9
Depreciation and amortization
	2013	$	856	$	669	$	228	$	348	$	52	$	0	$	2,153
	2012		768		610		217		238		48		0		1,881
	2011		570		554		202		0		21		0		1,347
Operating expenses^(d):
	2013	$	13,976	$	3,510	$	2,434	$	2,616	$	1,324	$	(2,618)	$	21,242
	2012		13,226		4,557		2,563		2,053		1,662		(3,043)		21,018
	2011		7,571		5,074		3,065		0		863		(1,990)		14,583
Equity in earnings (losses) of unconsolidated affiliates
	2013	$	10	$	0	$	0	$	0	$	0	$	0	$	10
	2012		(91)		0		0		0		0		0		(91)
	2011		(1)		0		0		0		0		0		(1)
Interest expense, net:
	2013	$	357	$	579	$	115	$	122	$	183	$	0	$	1,356
	2012		301		307		123		111		86		0		928
	2011		170		345		134		0		77		0		726
Income (loss) before income taxes:
	2013	$	1,675	$	401	$	557	$	344	$	(191)	$	(13)	$	2,773
	2012		1,058		618		508		(54)		(325)		(7)		1,798
	2011		2,827		666		535		0		(59)		(13)		3,956
Income taxes:
	2013	$	615	$	152	$	162	$	134	$	(20)	$	1	$	1,044
	2012		500		239		127		(23)		(215)		(1)		627
	2011		1,056		250		146		0		9		(4)		1,457
Net income (loss):
	2013	$	1,060	$	249	$	395	$	210	$	(171)	$	(14)	$	1,729
	2012		558		379		381		(31)		(110)		(6)		1,171
	2011		1,771		416		389		0		(68)		(9)		2,499
Capital expenditures:
	2013	$	2,752	$	1,433	$	537	$	587	$	86	$	0	$	5,395
	2012		3,554		1,246		422		500		67		0		5,789
	2011		2,491		1,028		481		0		42		0		4,042
Total assets:
	2013	$	41,232	$	24,118	$	9,617	$	7,861	$	8,317	$	(11,221)	$	79,924
	2012		40,681		22,905		9,353		7,506		10,432		(12,316)		78,561

(a) Generation includes the six power marketing reportable segments shown below: Mid-Atlantic, Midwest, New England, New York, ERCOT and Other Regions. Intersegment revenues for Generation for the year ended December 31, 2013 include revenue from sales to PECO of $405 and sales to BGE of $455 million in the Mid-Atlantic region, and sales to ComEd of $506 in the Midwest region, net of $7 million related to the unrealized mark-to-market losses related to the ComEd swap, which eliminate upon consolidation. For the year ended December 31, 2012 include revenue from sales to PECO of $543 and sales to BGE of $322 million in the Mid-Atlantic region, and sales to ComEd of $795 in the Midwest region, net of $7 million related to the unrealized mark-to-market losses related to the ComEd swap, which eliminate upon consolidation. For the year ended 2011 intersegment revenues for Generation include revenue from sales to PECO of $508 million in the Mid-Atlantic region, and sales to ComEd of $653 million in the Midwest region.

(b) Amounts represent activity recorded at BGE from March 12, 2012, the closing date of the merger, through December 31, 2013.

(c) Other primarily includes Exelon's corporate operations, shared service entities and other financing and investment activities.

(d) For the years ended December 31, 2013, 2012 and 2011, utility taxes of $79 million, $82 million and $27 million, respectively, are included in revenues and expenses for Generation. For the years ended December 31, 2013, 2012 and 2011, utility taxes of $241 million, $239 million and $243 million, respectively, are included in revenues and expenses for ComEd. For the years ended December 31, 2013, 2012 and 2011, utility taxes of $129 million, $141 million and $173 million, respectively, are included in revenues and expenses for PECO. For the year ended December 31, 2013 and for the period of March 12, 2012 through December 31, 2012, utility taxes of $82 million and $59 million are included in revenues and expenses for BGE, respectively.

(e) 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.

Exelon Generation Co L L C [Member]

Segment Reporting Information [Line Items]

Analysis and reconciliation of reportable segment revenues for Generation

Generation total revenues:
	2013						2012						2011
	Revenues from external customers ^(a)		Intersegment revenues		Total Revenues		Revenues from external customers ^(a)		Intersegment revenues		Total Revenues		Revenues from external customers ^(a)		Intersegment revenues		Total Revenues
Mid-Atlantic	$	5,182	$	22	$	5,204	$	5,082	$	(44)	$	5,038	$	4,052	$	0	$	4,052
Midwest		4,280		(10)		4,270		4,824		24		4,848		5,445		0		5,445
New England		1,245		(8)		1,237		1,048		45		1,093		11		0		11
New York		735		(21)		714		582		(25)		557		0		0		0
ERCOT		1,222		(6)		1,216		1,365		2		1,367		575		0		575
Other Regions (b)		946		22		968		755		78		833		201		0		201
Total Revenues for Reportable Segments	$	13,610	$	(1)	$	13,609	$	13,656	$	80	$	13,736	$	10,284	$	0	$	10,284
Other (c)		2,020		1		2,021		781		(80)		701		163		0		163
Total Generation Consolidated Operating Revenues	$	15,630	$	0	$	15,630	$	14,437	$	0	$	14,437	$	10,447	$	0	$	10,447

Analysis and reconciliation of reportable segment revenues net of purchased power and fuel expense for Generation

Generation total revenues net of purchased power and fuel expense:
	2013						2012						2011
	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	$	3,273	$	(3)	$	3,270	$	3,477	$	(44)	$	3,433	$	3,350	$	0	$	3,350
Midwest		2,585		1		2,586		2,974		24		2,998		3,547		0		3,547
New England		217		(32)		185		151		45		196		9		0		9
New York		14		(18)		(4)		101		(25)		76		-		0		-
ERCOT		604		(168)		436		403		2		405		84		0		84
Other Regions (b)		334		(133)		201		53		78		131		(14)		0		(14)
Total Revenues net of purchased power and fuel expense for Reportable Segments	$	7,027	$	(353)	$	6,674	$	7,159	$	80	$	7,239	$	6,976	$	0	$	6,976
Other (c)		406		353		759		217		(80)		137		(118)		0		(118)
Total Generation Revenues net of purchased power and fuel expense	$	7,433	$	0	$	7,433	$	7,376	$	0	$	7,376	$	6,858	$	0	$	6,858

(a) Includes purchases and sales from third parties and affiliated sales to ComEd, PECO and BGE.

(b) Other regions include the South, West and Canada, which are not considered individually significant.

(c) Other represents activities not allocated to a region. See text above for a description of included activities. Also includes amortization of intangible assets related to commodity contracts recorded at fair value of $488 million and $1,098 million, for the years ended December 31, 2013 and 2012, respectively, and the elimination of intersegment revenues.

Reconciliation of revenues from segments to consolidated

(a) Includes all electric sales to third parties and affiliated sales to ComEd, PECO and BGE.

(b) Other regions include the South, West and Canada, which are not considered individually significant.

(c) Other represents activities not allocated to a region. See text above for a description of included activities. Also includes amortization of intangible assets related to commodity contracts recorded at fair value of $767 million and $1,505 million for the years ended December 31, 2013 and 2012, respectively, and elimination of intersegment revenues.

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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