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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Components of Provision for Net Periodic Benefit Cost (Credit) The components of Dominion Energy’s provision for net periodic benefit cost (credit) are as follows:

 

 

Pension Benefits

 

 

Other Postretirement Benefits

 

 

 

Quarter-to-Date

 

 

Year-to-Date

 

 

Quarter-to-Date

 

 

Year-to-Date

 

Period Ended June 30,

 

2024

 

 

2023

 

 

2024

 

 

2023

 

 

2024

 

 

2023

 

 

2024

 

 

2023

 

(millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service cost

 

$

22

 

 

$

24

 

 

$

44

 

 

$

48

 

 

$

3

 

 

$

4

 

 

$

6

 

 

$

7

 

Interest cost

 

 

108

 

 

 

110

 

 

 

217

 

 

 

221

 

 

 

14

 

 

 

16

 

 

 

28

 

 

 

31

 

Expected return on plan assets

 

 

(207

)

 

 

(216

)

 

 

(411

)

 

 

(432

)

 

 

(43

)

 

 

(38

)

 

 

(85

)

 

 

(76

)

Amortization of prior service
    cost (credit)

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

(9

)

 

 

(9

)

 

 

(18

)

 

 

(18

)

Amortization of net actuarial
    (gain) loss

 

 

7

 

 

 

—

 

 

 

13

 

 

 

—

 

 

 

(2

)

 

 

(2

)

 

 

(4

)

 

 

(3

)

Settlements and curtailments(1)

 

 

4

 

 

 

—

 

 

 

4

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Plan amendment

 

 

—

 

 

 

—

 

 

 

22

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Net periodic benefit (credit) cost

 

$

(66

)

 

$

(82

)

 

$

(111

)

 

$

(163

)

 

$

(37

)

 

$

(29

)

 

$

(73

)

 

$

(59

)
(1)
2024 amount relates to Dominion Energy nonqualified pension plan.