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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2011
Changes to Asset Retirement Obligations
 
Amount

(millions)
 
Dominion
 
AROs at December 31, 2009(1)
$
1,614

Obligations incurred during the period
1

Obligations settled during the period
(9
)
Revisions in estimated cash flows
5

Accretion
85

Obligations relieved due to sale of Appalachian E&P operations
(105
)
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

 
 
Virginia Power
 

AROs at December 31, 2009(3)
$
637

Accretion
35

AROs at December 31, 2010(3)
$
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(3)
$
625

(1)
Includes $9 million, $14 million and $15 million reported in other current liabilities at December 31, 2009, 2010, and 2011, 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)
Includes $1 million, $3 million and $1 million reported in other current liabilities at December 31, 2009, 2010 and 2011, respectively.