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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 June 30,
 
 
 
  
 
 
  
 
 
  
 
 
Service cost
 
$
40
 
   $
40
   
$
6
 
   $
6
 
Interest cost
 
 
98
 
    
84
   
 
17
 
    
14
 
Expected return on plan assets
 
 
(176
)
   
(168
 )  
 
(35
)
   
(35
 )
Amortization of prior service cost (credit)
 
 
1
 
    
1
   
 
(13
)
   
(13
 )
Amortization of net actuarial loss
 
 
43
 
    
49
   
 
3
 
    
2
 
Curtailment
(1)
  
 
71
 
    
—
   
 
42
 
    
—
 
                                 
Net periodic benefit cost (credit)
 
$
77
 
   $
6
   
$
20
 
   $
(26
 )
                                 
Six Months Ended June 30,
 
 
 
  
 
 
  
 
 
  
 
 
Service cost
 
$
80
 
   $
79
   
$
13
 
   $
13
 
Interest cost
 
 
199
 
    
168
   
 
34
 
    
28
 
Expected return on plan assets
 
 
(353
)
   
(333
 )  
 
(68
)
   
(71
 )
Amortization of prior service cost (credit)
 
 
1
 
    
1
   
 
(26
)
   
(26
 )
Amortization of net actuarial loss
 
 
82
 
    
97
   
 
7
 
    
5
 
Settlements and Curtailment
(1)
  
 
73
 
    
—
   
 
42
 
    
—
 
                                 
Net periodic benefit cost (credit)
 
$
     82
 
   $
     12
   
$
     2
 
   $
     (51
 )
                                 
(1)
Primarily related to a voluntary retirement program.
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 June 30,
   
     
     
     
 
Service cost
 
$
4
 
   $
5
   
$
1
 
   $
1
 
Interest cost
 
 
8
 
    
7
   
 
2
 
    
2
 
Expected return on plan assets
 
 
(39
)
   
(38
 )  
 
(7
)
   
(6
 )
Amortization of prior service credit
 
 
—
 
    
—
   
 
(1
)
   
(1
 )
Amortization of net actuarial loss
 
 
5
 
    
5
   
 
1
 
    
1
 
Curtailment
(1)
  
 
1
 
    
—
   
 
1
 
    
—
 
                                 
Net periodic benefit credit
 
$
(21
)
  $
(21
 )  
$
(3
)
  $
(3
 )
                                 
Six Months Ended June 30,
 
 
 
  
 
 
  
 
 
  
 
 
Service cost
 
$
8
 
   $
9
   
$
2
 
   $
2
 
Interest cost
 
 
16
 
    
14
   
 
5
 
    
5
 
Expected return on plan assets
 
 
(78
)
   
(75
 )  
 
(14
)
   
(14
 )
Amortization of prior service credit
 
 
—
 
    
—
   
 
(2
)
   
(2
 )
Amortization of net actuarial loss
 
 
10
 
    
10
   
 
2
 
    
2
 
Curtailment
(1)
  
 
1
 
    
—
   
 
1
 
    
—
 
                                 
Net periodic benefit credit
 
$
     (43
)
  $
     (42
 )  
$
     (6
)
  $
     (7)
 
                                 
 
 
 
 
 
 
(1)
Related to a voluntary retirement program.