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Asset Retirement Obligations (Tables)
Nov. 18, 2019
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
  $
83
 
Obligations incurred during the period
   
1
 
Obligations settled during the period
   
(4
 )
Accretion
   
5
 
         
AROs at December 31, 2017
(3)
   $
85
 
         
Obligations incurred during the period
 
 
3
 
Obligations settled during the period
 
 
(6
)
Accretion
 
 
6
 
         
AROs at December 31, 2018
(3)
  
$
88
 
         
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(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 $76 million and $74 million reported in other deferred credits and other liabilities, with the remainder recorded in other current liabilities, at December 31, 2017 and 2018, respectively.