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Segment Information (Tables)
 6 Months Ended
Jun. 30, 2014
Segment Reporting Information [Line Items]  
Analysis and reconciliation of reportable segment information

Three Months Ended June 30, 2014 and 2013

__________

(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 three months ended June 30, 2014 include revenue from sales to PECO of $49 million and sales to BGE of $87 million in the Mid-Atlantic region, and sales to ComEd of $65 million in the Midwest region. For the three months ended June 30, 2013 intersegment revenues for Generation include revenue from sales to PECO of $97 million and sales to BGE of $99 million in the Mid-Atlantic region, sales to ComEd of $121 million in the Midwest region, and $10 million related to the unrealized mark-to-market gains related to the ComEd swap, which eliminate upon consolidation.

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

(c)       For the three months ended June 30, 2014 and 2013, utility taxes of $21 million and $18 million, respectively, are included in revenues and expenses for Generation. For the three months ended June 30, 2014 and 2013, utility taxes of $56 million and $56 million, respectively, are included in revenues and expenses for ComEd. For the three months ended June 30, 2014 and 2013, utility taxes of $30 million and $31 million, respectively, are included in revenues and expenses for PECO. For the three months ended June 30, 2014 and 2013, utility taxes of $19 million and $19 million, respectively, are included in revenues and expenses for BGE.

(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.

 

Six Months Ended June 30, 2014 and 2013

                 Intersegment Eliminations   
  Generation (a)(b) ComEd PECO BGE Other (c)   Exelon
Total revenues (d):
 2014$8,179 $2,262 $1,649 $1,707 $619 $(1,155) $13,261
 2013 7,603  2,239  1,567  1,533  615  (1,334)  12,223
Intersegment revenues (e):
 2014$517 $1 $1 $18 $618 $(1,155) $0
 2013 710  1  0  8  615  (1,334)  0
Net income (loss):
 2014$188 $209 $173 $106 $(25) $0 $651
 2013 310  14  200  106  (132)  0  498

__________

(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 six months ended June 30, 2014 include revenue from sales to PECO of $ 137 million and sales to BGE of $ 207 million in the Mid-Atlantic region, and sales to ComEd of $ 173 million in the Midwest region. For the six months ended June 30, 2013 intersegment revenues for Generation include revenue from sales to PECO of $238 million in the Mid-Atlantic region and sales to BGE of $212 million in the Mid-Atlantic region, and sales to ComEd of $266 million 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.

(b)       Amounts include activity recorded at CENG from April 1, 2014, the date of integration, through June 30, 2014.

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

(d)       For the six months ended June 30, 2014 and 2013, utility taxes of $45 million and $39 million, respectively, are included in revenues and expenses for Generation. For the six months ended June 30, 2014 and 2013, utility taxes of $119 million and $117 million, respectively, are included in revenues and expenses for ComEd. For the six months ended June 30, 2014 and 2013, utility taxes of $65 million and $64 million, respectively, are included in revenues and expenses for PECO. For the six months ended June 30, 2014 and 2013, utility taxes of $43 million and $41 million, respectively, are included in revenues and expenses for BGE.

(e)       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.

 
Exelon Generation Co L L C [Member]
  
Segment Reporting Information [Line Items]  
Analysis and reconciliation of reportable segment revenues net of purchased power and fuel expense for Generation

Three Months Ended June 30, 2014 and 2013

Generation total revenues net of purchased power and fuel expense (three months ended):
 2014 2013
 RNF from external customers (a) Intersegment RNF  Total RNF RNF from external customers (a) Intersegment RNF Total RNF
Mid-Atlantic$906 $14 $920 $770 $ (2) $768
Midwest 604  1  605  687   (3)  684
New England 88  (24)  64  85   (35)  50
New York 142  6  148  0   14  14
ERCOT 117  (58)  59  143   (31)  112
Other Regions (b) 157  (82)  75  111   (52)  59
Total Revenues net of purchased power and fuel expense for Reportable Segments 2,014  (143)  1,871  1,796  (109)  1,687
Other (c) (60)  143  83  328   109  437
Total Generation Revenues net of purchased power and fuel expense$1,954 $0 $1,954 $2,124 $ - $2,124

 

(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 at the date of merger with Constellation and the consolidation of CENG in purchase accounting of $50 million and $167 million for the three months ended June 30, 2014 and 2013, respectively, and the elimination of intersegment revenues.

 

Six Months Ended June 30, 2014 and 2013

Generation total revenues net of purchased power and fuel expense (six months ended):
 2014 2013
 RNF from external customers (a) Intersegment RNF  Total RNF RNF from external customers (a) Intersegment RNF Total RNF
Mid-Atlantic (b)$1,690 $(75) $1,615 $1,622 $(10) $1,612
Midwest 1,134  27  1,161  1,397  4  1,401
New England 242  (42)  200  103  (23)  80
New York (b) 113  14  127  (16)  8  (8)
ERCOT 272  (130)  142  255  (42)  213
Other Regions (c) 307  (127)  180  122  (17)  105
Total Revenues net of purchased power and fuel expense for Reportable Segments 3,758  (333)  3,425  3,483  (80)  3,403
Other (d) (770)  333  (437)  6  80  86
Total Generation Revenues net of purchased power and fuel expense$2,988 $0 $2,988 $3,489 $0 $3,489

 

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

(b)       Amounts include activity recorded at CENG from April 1, 2014, the date of integration, through June 30, 2014.

(c)       Other 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 at the date of merger with Constellation and the consolidation of CENG in purchase accounting of $92 million and $341 million, for the six months ended June 30, 2014 and 2013, respectively.