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Retirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The following tables present the components of Exelon’s net periodic benefit costs, prior to any capitalization, for the three and nine months ended September 30, 2015 and 2014.
 
Pension Benefits
Three Months Ended
September 30,
 
Other Postretirement Benefits
Three Months Ended
September 30,
 
2015(a)
 
2014(a)
 
2015(a)
 
2014(a)
Service cost
$
82

 
$
74

 
$
30

 
$
27

Interest cost
178

 
189

 
42

 
42

Expected return on assets
(257
)
 
(251
)
 
(38
)
 
(39
)
Amortization of:
 
 
 
 
 
 
 
Prior service cost (benefit)
3

 
3

 
(43
)
 
(44
)
Actuarial loss
142

 
106

 
20

 
15

Net periodic benefit cost
$
148

 
$
121

 
$
11

 
$
1

 
 
 
 
 
 
 
 
 
Pension Benefits
Nine Months Ended
September 30,
 
Other Postretirement Benefits
Nine Months Ended
September 30,
 
2015(b)
 
2014(b)
 
2015(b)
 
2014(b)
Service cost
$
245

 
$
218

 
$
89

 
$
90

Interest cost
533

 
561

 
125

 
144

Expected return on assets
(770
)
 
(743
)
 
(113
)
 
(115
)
Amortization of:
 
 
 
 
 
 
 
Prior service cost (benefit)
10

 
10

 
(130
)
 
(79
)
Actuarial loss
427

 
316

 
60

 
35

Net periodic benefit cost
$
445

 
$
362

 
$
31

 
$
75

______________ 
(a)
For the three months ended September 30, 2015, the cost for pension benefits and other postretirement benefits related to CENG were $2 million and $3 million, respectively. For the three months ended September 30, 2014, the cost for pension benefits and other postretirement benefits related to CENG were $2 million and $3 million, respectively. CENG amounts are included in the tables above.
(b)
For the nine months ended September 30, 2015, the cost for pension benefits and other postretirement benefits related to CENG were $8 million and $8 million, respectively. For the period of April 1, 2014 to September 30, 2014, the cost for pension benefits and other postretirement benefits related to CENG were $5 million and $6 million, respectively. CENG amounts are included in the tables above.
Schedule Of Pension And Other Postretirement Benefit Costs
The amounts below represent Generation’s, ComEd’s, PECO’s, BGE’s and BSC's allocated portion of the pension and postretirement benefit plan costs, which were included in Property, plant and equipment within the respective Consolidated Balance Sheets and Operating and maintenance expense within the Consolidated Statement of Operations and Comprehensive Income during the three and nine months ended September 30, 2015 and 2014.
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
Pension and Other Postretirement Benefit Costs
2015
 
2014
 
2015
 
2014
Generation(a)
$
67

 
$
54

 
$
200

 
$
193

ComEd
52

 
33

 
155

 
129

PECO
10

 
7

 
29

 
28

BGE
16

 
17

 
49

 
50

BSC(b)
14

 
11

 
43

 
37

______________ 
(a)
For the three and nine months ended September 30, 2015, the costs related to CENG were $5 million and $16 million, respectively. For the three months ended September 30, 2014, the costs related to CENG were $5 million. For the period of April 1, 2014 to September 30, 2014, the costs related to CENG were $11 million. CENG amounts are included in the table above.
(b)
These amounts primarily represent amounts billed to Exelon’s subsidiaries through intercompany allocations. These amounts are not included in the Generation, ComEd, PECO or BGE amounts above.
Schedule Of Defined Contributions
The following table presents the matching contributions to the savings plans during the three and nine months ended September 30, 2015 and 2014:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
Savings Plan Matching Contributions
 
2015
 
2014
 
2015
 
2014
Exelon(a)
 
$
51

 
$
34

 
$
111

 
$
82

Generation(a)
 
27

 
17

 
60

 
41

ComEd
 
10

 
8

 
23

 
20

PECO
 
3

 
2

 
7

 
6

BGE
 
5

 
3

 
10

 
7

BSC(b)
 
6

 
4

 
11

 
8

_______________ 
(a)
Includes $4 million and $8 million, respectively, related to CENG for the three and nine months ended September 30, 2015. Includes $1 million related to CENG for the three months ended September 30, 2014 and for the period from April 1, 2014 to September 30, 2014.
(b)
These amounts primarily represent amounts billed to Exelon’s subsidiaries through intercompany allocations. These costs are not included in the Generation, ComEd, PECO or BGE amounts above.