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Segment Information (Tables)
 3 Months Ended
Mar. 31, 2015
Segment Reporting Information [Line Items]  
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 three months ended March 31, 2015 and 2014 is as follows:
 
Generation(a)
 
ComEd
 
PECO
 
BGE
 
Other(b)
 
Intersegment Eliminations
 
Exelon
Total revenues(c):
 
 
 
 
 
 
 
 
 
 
 
 
 
2015
$
5,840

 
$
1,185

 
$
985

 
$
1,036

 
$
318

 
$
(534
)
 
$
8,830

2014
4,390

 
1,134

 
993

 
1,054

 
290

 
(624
)
 
7,237

Intersegment revenues(d):
 
 
 
 
 
 
 
 
 
 
 
 
 
2015
$
210

 
$
1

 
$
—

 
$
7

 
$
316

 
$
(533
)
 
$
1

2014
316

 
1

 
1

 
16

 
290

 
(623
)
 
1

Net income (loss):
 
 
 
 
 
 
 
 
 
 
 
 
 
2015
$
485

 
$
90

 
$
139

 
$
109

 
$
(84
)
 
$
(1
)
 
$
738

2014
(185
)
 
98

 
89

 
88

 
4

 
(1
)
 
93

Total assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
March 31, 2015
$
45,318

 
$
25,731

 
$
10,169

 
$
8,130

 
$
10,457

 
$
(12,414
)
 
$
87,391

December 31, 2014
45,348

 
25,392

 
9,943

 
8,078

 
9,794

 
(11,741
)
 
86,814

 __________
(a)
Generation includes the six power marketing 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 March 31, 2015 include revenue from sales to PECO of $63 million and sales to BGE of $138 million in the Mid-Atlantic region, and sales to ComEd of $9 million in the Midwest. For the three months ended March 31, 2014, intersegment revenues for Generation include revenue from sales to PECO of $88 million and sales to BGE of $120 million in the Mid-Atlantic region, and sales to ComEd of $108 million in the Midwest region.
(b)
Other primarily includes Exelon’s corporate operations, shared service entities and other financing and investment activities.
(c)
For the three months ended March 31, 2015 and 2014, utility taxes of $27 million and $24 million, respectively, are included in revenues and expenses for Generation. For the three months ended March 31, 2015 and 2014, utility taxes of $62 million and $63 million, respectively, are included in revenues and expenses for ComEd. For the three months ended March 31, 2015 and 2014, utility taxes of $35 million and $35 million, respectively, are included in revenues and expenses for PECO. For the three months ended March 31, 2015 and 2014, utility taxes of $52 million and $20 million, respectively, are included in revenues and expenses for BGE.
(d)
Intersegment revenues exclude sales to unconsolidated affiliates. The intersegment profit associated with the 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.
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Analysis and reconciliation of reportable segment revenues for Generation
 
Three Months Ended March 31, 2015
 
Three Months Ended March 31, 2014
 
Revenues
from external
customers(b)
 
Intersegment
revenues
 
Total
Revenues(a)
 
Revenues
from external
customers(b)
 
Intersegment
revenues
 
Total
Revenues
Mid-Atlantic
$
1,517

 
$
(4
)
 
$
1,513

 
$
1,441

 
$
(23
)
 
$
1,418

Midwest
1,275

 
1

 
1,276

 
1,258

 
12

 
1,270

New England
858

 
1

 
859

 
545

 
4

 
549

New York
310

 
—

 
310

 
190

 
(3
)
 
187

ERCOT
182

 
(2
)
 
180

 
243

 
—

 
243

Other Power Regions(c)
212

 
2

 
214

 
334

 
7

 
341

Total Revenues for Reportable Segments
4,354

 
(2
)
 
4,352

 
4,011

 
(3
)
 
4,008

Other(d)
1,486

 
2

 
1,488

 
379

 
3

 
382

Total Generation Consolidated Operating Revenues
$
5,840

 
$
—

 
$
5,840

 
$
4,390

 
$
—

 
$
4,390


 
__________
(a)
On April 1, 2014, Generation assumed operational control of CENG's nuclear fleet. As a result, the 2015 financial results include CENG's revenues on a fully consolidated basis.
(b)
Includes all wholesale and retail electric sales to third parties and affiliated sales to ComEd, PECO and BGE.
(c)
Other Power Regions include the South, West and Canada, which are not considered individually significant.
(d)
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 $40 million increase to revenues and $93 million decrease to revenues, for the three months ended March 31, 2015 and 2014, respectively, unrealized mark-to-market gains of $154 million and losses of $760 million for the three months ended March 31, 2015 and 2014, respectively, and elimination of intersegment revenues.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exelon Generation Co L L C [Member]  
Segment Reporting Information [Line Items]  
Analysis and reconciliation of reportable segment revenues for Generation
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
Three Months Ended March 31, 2015
 
Three Months Ended March 31, 2014
 
RNF
from external
customers(b)
 
Intersegment
RNF
 
Total
RNF(a)
 
RNF
from external
customers(b)
 
Intersegment
RNF
 
Total
RNF
Mid-Atlantic
$
784

 
$
(2
)
 
$
782

 
$
784

 
$
(89
)
 
$
695

Midwest
701

 
(1
)
 
700

 
530

 
26

 
556

New England
177

 
(19
)
 
158

 
154

 
(18
)
 
136

New York
174

 
14

 
188

 
(29
)
 
8

 
(21
)
ERCOT
88

 
(33
)
 
55

 
155

 
(72
)
 
83

Other Power Regions(c)
99

 
(53
)
 
46

 
150

 
(45
)
 
105

Total Revenues net of purchased power and fuel expense for Reportable Segments
2,023

—

(94
)
 
1,929

 
1,744

 
(190
)
 
1,554

Other(d)
384

 
94

 
478

 
(711
)
 
190

 
(521
)
Total Generation Revenues net of purchased power and fuel expense
$
2,407

—

$
—

 
$
2,407

 
$
1,033

 
$
—

 
$
1,033

 __________
(a)
On April 1, 2014, Generation assumed operational control of CENG's nuclear fleet. As a result, the 2015 financial results include CENG's revenue net of purchased power and fuel expense on a fully consolidated basis.
(b)
Includes purchases and sales from third parties and affiliated sales to ComEd, PECO and BGE.
(c)
Other Power Regions include the South, West and Canada, which are not considered individually significant.
(d)
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 $38 million increase to RNF and $42 million decrease to RNF for the three months ended March 31, 2015 and 2014, respectively, unrealized mark-to-market gains of $162 million and losses of $730 million for the three months ended March 31, 2015 and 2014, respectively, and the elimination of intersegment revenue net of purchased power and fuel expense.