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Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
GOODWILL AND INTANGIBLE ASSETS
Goodwill     
The changes in Dominion's carrying amount and segment allocation of goodwill are presented below:
 
 
Dominion
Generation

Dominion
Energy

DVP

Corporate
and
Other

Total

(millions)
 
 
 
 
 
Balance at December 31, 2010(1)
$
1,338

$
712

$
1,091

$

$
3,141

Impairments/adjustments





Balance at December 31, 2011(1)
$
1,338

$
712

$
1,091

$

$
3,141

Asset disposition adjustment

(11
)


(11
)
Balance at December 31, 2012(1)
$
1,338

$
701

$
1,091

$

$
3,130


(1)
Goodwill amounts do not contain any accumulated impairment losses.
 
 
 
Other Intangible Assets
Dominion's and Virginia Power's other intangible assets are subject to amortization over their estimated useful lives. Dominion's amortization expense for intangible assets was $82 million, $78 million and $107 million for 2012, 2011 and 2010, respectively. In 2012, Dominion acquired $102 million of intangible assets, primarily representing software, with an estimated weighted-average amortization period of approximately 19 years. Amortization expense for Virginia Power's intangible assets was $22 million, $22 million and $26 million for 2012, 2011, and 2010, respectively. In 2012, Virginia Power acquired $53 million of intangible assets, primarily representing software, with an estimated weighted-average amortization period of 31 years. The components of intangible assets are as follows:
 
At December 31,
2012
 
2011
 
 
Gross
Carrying
Amount

Accumulated
Amortization

Gross
Carrying
Amount

Accumulated
Amortization

(millions)
 
 
 
 
Dominion
 
 
 
 
Software, licenses and other
$
859

$
327

$
888

$
278

Emissions allowances
5

1

80

53

Total
$
864

$
328

$
968

$
331

 
 
 
 
 
Virginia Power
 

 

 

 

Software, licenses and other
$
303

$
122

$
285

$
102

Total
$
303

$
122

$
285

$
102


Annual amortization expense for these intangible assets is estimated to be as follows:
 
 
2013

2014

2015

2016

2017

(millions)
 
 
 
 
 
Dominion
$
65

$
56

$
43

$
37

$
25

 
 
 
 
 
 
Virginia Power
$
20

$
18

$
12

$
8

$
5