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Employee Benefit Plans (Tables)
Nov. 18, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Net Periodic Benefit Cost (Credit)
The components of Dominion Energy’s provision for net periodic benefit cost (credit) were as follows:
                                 
 
Pension Benefits
   
Other Postretirement Benefits
 
 
2019
 
 
2018
   
2019
 
 
2018
 
(millions)
 
 
 
 
 
 
 
 
Three Months Ended March 31,
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
40
 
  $
39
   
$
7
 
  $
7
 
Interest cost
 
 
        101
 
   
84
   
 
17
 
   
14
 
Expected return on plan assets
 
 
(177
)
   
(165
)  
 
(33
)
   
(36
)
Amortization of prior service credit
 
 
 
   
   
 
(13
)
   
(13
)
Amortization of net actuarial loss
 
 
39
 
   
        48
   
 
4
 
   
3
 
Settlements
 
 
2
 
   
   
 
 
   
 
                                 
Net periodic benefit cost (credit)
 
$
5
 
  $
6
   
$
(18
)
  $
(25
)
                                 
 
 
 
Dominion Energy Gas Holdings, LLC  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Net Periodic Benefit Cost (Credit)
The components of Dominion Energy Gas’ provision for net periodic benefit cost (credit) for employees represented by collective bargaining units were as follows:
                                 
 
Pension Benefits
   
Other Postretirement Benefits
 
 
      2019      
 
 
      2018      
   
      2019      
 
 
      2018      
 
(millions)
   
     
     
     
 
Three Months Ended March 31,
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
4
 
  $
4
   
$
1
 
  $
1
 
Interest cost
 
 
8
 
   
7
   
 
3
 
   
3
 
Expected return on plan assets
 
 
(39
)
   
(37
)  
 
(7
)
   
(8
)
Amortization of prior service credit
 
 
 
   
   
 
(1
)
   
(1
)
Amortization of net actuarial loss
 
 
5
 
   
5
   
 
1
 
   
1
 
                                 
Net periodic benefit credit
 
$
(22
)
  $
(21
)  
$
(3
)
  $
(4
)