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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2018
Asset Retirement Obligation Disclosure [Abstract]  
Changes to Asset Retirement Obligations

The changes to AROs during 2017 and 2018 were as follows:

 

      Amount  
(millions)       

Dominion Energy

   

AROs at December 31, 2016

    $ 2,485  

Obligations incurred during the period

      37  

Obligations settled during the period

      (214 ) 

Revisions in estimated cash flows

      7  

Accretion

      117  

AROs at December 31, 2017(1)

    $ 2,432  

Obligations incurred during the period

      20  

Obligations settled during the period

      (159 ) 

Revisions in estimated cash flows(2)

      120  

Accretion

      119  

AROs at December 31, 2018(1)

    $ 2,532  

Virginia Power

   

AROs at December 31, 2016

    $ 1,443  

Obligations incurred during the period

      11  

Obligations settled during the period

      (152 ) 

Revisions in estimated cash flows

      (1 ) 

Accretion

      64  

AROs at December 31, 2017

    $ 1,365  

Obligations incurred during the period

      14  

Obligations settled during the period

      (119 ) 

Revisions in estimated cash flows(2)

      120  

Accretion

      65  

AROs at December 31, 2018

    $ 1,445  

Dominion Energy Gas

   

AROs at December 31, 2016

    $ 156  

Obligations incurred during the period

      2  

Obligations settled during the period

      (7 ) 

Accretion

      9  

AROs at December 31, 2017(3)

    $ 160  

Obligations incurred during the period

      4  

Obligations settled during the period

      (6 ) 

Accretion

      9  

AROs at December 31, 2018(3)

    $ 167  

 

(1)

Includes $263 million and $282 million reported in other current liabilities at December 31, 2017, and 2018, respectively.
(2)

Reflects future ash pond and landfill closure costs at certain utility generation facilities. See Note 22 for further information.
(3)

Includes $146 million and $153 million reported in other deferred credits and other liabilities, with the remainder recorded in other current liabilities, at December 31, 2017 and 2018, respectively.