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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2014
Asset Retirement Obligation [Abstract]  
Changes to Asset Retirement Obligations
The changes to AROs during 2013 and 2014 were as follows:
 
 
Amount

(millions)
 
Dominion
 
AROs at December 31, 2012(1)
$
1,705

Obligations incurred during the period
13

Obligations settled during the period
(68
)
Revisions in estimated cash flows(2)
(129
)
Accretion
86

Other
(29
)
AROs at December 31, 2013(1)
$
1,578

Obligations incurred during the period
40

Obligations settled during the period
(82
)
Revisions in estimated cash flows(3)
102

Accretion
81

Other
(5
)
AROs at December 31, 2014(1)
$
1,714

Virginia Power
 

AROs at December 31, 2012
$
705

Obligations incurred during the period
2

Obligations settled during the period
(2
)
Revisions in estimated cash flows(2)
(52
)
Accretion
38

Other
(2
)
AROs at December 31, 2013
$
689

Obligations incurred during the period
28

Obligations settled during the period
(1
)
Revisions in estimated cash flows(3)
108

Accretion
37

Other
(6
)
AROs at December 31, 2014(4)
$
855

Dominion Gas
 

AROs at December 31, 2012
$
133

Obligations incurred during the period
8

Obligations settled during the period
(13
)
Accretion
8

Other
1

AROs at December 31, 2013(5)(6)
$
137

Obligations incurred during the period
2

Obligations settled during the period
(8
)
Accretion
8

Other
8

AROs at December 31, 2014(5)(6)
$
147

(1)
Includes $64 million, $94 million and $81 million reported in other current liabilities at December 31, 2012, 2013, and 2014, respectively.
(2)
Primarily reflects lower anticipated nuclear decommissioning costs.
(3)
Relates primarily to a shift of the delayed planned date on which the DOE is expected to begin accepting spent nuclear fuel.
(4)
Includes $7 million reported in other current liabilities at December 31, 2014.
(5)
Includes $2 million and $7 million reported in other current liabilities at December 31, 2013 and 2014, respectively.
(6)
Includes $135 million and $140 million reported in other deferred credits and other liabilities, with the remainder recorded in other current liabilities, at December 31, 2013 and 2014, respectively.