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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2016
Accounting Policies [Abstract]  
Schedule Of Capitalized Software
The following table presents net unamortized capitalized software costs and amortization of capitalized software costs by year:
 
Net unamortized software costs
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE
 
Pepco
 
DPL
 
ACE
December 31, 2016
$
808

 
$
173

 
$
213

 
$
91

 
$
164

 
$
1

 
$
1

 
$
1

December 31, 2015
633

 
180

 
172

 
86

 
178

 
—

 
1

 
1

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of capitalized software costs
Exelon
 
Generation
 
ComEd
 
PECO
 
BGE 
 
Pepco
 
DPL
 
ACE
2016
$
255

 
$
72

 
$
62

 
$
33

 
$
44

 
$
—

 
$
—

 
$
—

2015
208

 
73

 
47

 
33

 
46

 
(2
)
 
—

 
—

2014
186

 
59

 
45

 
28

 
43

 
2

 
—

 
—




 
Successor
 
 
Predecessor
 
 
 
 
PHI
December 31, 2016
 
 
December 31, 2015
 
 
 
 
Net unamortized software costs
$
153

 
 
$
172

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Successor
 
 
Predecessor
PHI
March 24, 2016 to December 31, 2016
 
 
January 1, 2016 to March 23, 2016
 
For the Year Ended December 31, 2015
 
For the Year Ended December 31, 2014
Amortization of capitalized software costs
$
29

 
 
$
8

 
$
36

 
$
30
Schedule Of Capitalized Interest And AFUDC
The following table summarizes total incurred interest, capitalized interest and credits to AFUDC by year:
 
 
 
Exelon(a)
 
Generation(a)
 
ComEd
 
PECO
 
BGE
 
Pepco
 
DPL
 
ACE
2016
Total incurred interest(b)
$
1,678

 
$
472

 
$
469

 
$
127

 
$
114

 
$
137

 
$
52

 
$
65

 
Capitalized interest
108

 
107

 
—

 
—

 
—

 
—

 
—

 
—

 
Credits to AFUDC debt and equity
98

 
—

 
22

 
11

 
30

 
29

 
7

 
9

2015
Total incurred interest(b)
$
1,170

 
$
445

 
$
336

 
$
116

 
$
113

 
$
131

 
$
51

 
$
65

 
Capitalized interest
79

 
79

 
—

 
—

 
—

 
—

 
—

 
—

 
Credits to AFUDC debt and equity
44

 
—

 
9

 
7

 
28

 
19

 
2

 
2

2014
Total incurred interest(b)
$
1,144

 
$
419

 
$
323

 
$
115

 
$
118

 
$
121

 
$
49

 
$
65

 
Capitalized interest
63

 
63

 
—

 
—

 
—

 
—

 
—

 
—

 
Credits to AFUDC debt and equity
37

 
—

 
5

 
8

 
24

 
16

 
3

 
2


 
Successor
 
 
Predecessor
PHI
March 24, 2016 to December 31, 2016
 
 
January 1, 2016 to March 23, 2016
 
For the Year Ended December 31, 2015
 
For the Year Ended December 31, 2014
Total incurred interest(b)
$
207

 
 
$
68

 
$
289

 
$
277

Credits to AFUDC debt and equity
35

 
 
10

 
23

 
21