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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2012
Asset Retirement Obligation [Abstract]  
Changes to Asset Retirement Obligations
The changes to AROs during 2011 and 2012 were as follows:
 
 
Amount

(millions)
 
Dominion
 
AROs at December 31, 2010(1)
$
1,591

Obligations incurred during the period
16

Obligations settled during the period
(16
)
Revisions in estimated cash flows(2)
(277
)
Accretion
84

AROs at December 31, 2011(1)
$
1,398

Obligations incurred during the period
24

Obligations settled during the period
(13
)
Revisions in estimated cash flows(3)
242

Accretion
77

Other
(23
)
AROs at December 31, 2012(1)
$
1,705

 
 
Virginia Power
 

AROs at December 31, 2010(4)
$
672

Obligations incurred during the period
10

Obligations settled during the period
(3
)
Revisions in estimated cash flows(2)
(90
)
Accretion
36

AROs at December 31, 2011(4)
$
625

Obligations incurred during the period
18

Obligations settled during the period
(1
)
Revisions in estimated cash flows(5)
41

Accretion
34

Other
(12
)
AROs at December 31, 2012
$
705

(1)
Includes $14 million, $15 million and $64 million reported in other current liabilities at December 31, 2010, 2011, and 2012, respectively.
(2)
Primarily reflects the effect of lower anticipated costs due to the expected future recovery from the DOE of certain spent fuel storage costs.
(3)
Primarily reflects the accelerated timing of the decommissioning of Kewaunee to begin in 2013.
(4)
Includes $3 million and $1 million reported in other current liabilities at December 31, 2010 and 2011, respectively.
(5)
Primarily reflects the effect of higher anticipated nuclear decommissioning costs.