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Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2019
Compensation And Retirement Disclosure [Abstract] |
Employee Benefit Plans | Note 21. Employee Benefit Plans Dominion Energy 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 September 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 41 |  |  | $ | 39 |  |  | $ | 7 |  |  | $ | 7 |
Interest cost |  |  | 97 |  |  |  | 85 |  |  |  | 17 |  |  |  | 14 |
Expected return on plan assets |  |  | (177 | ) |  |  | (165 | ) |  |  | (37 | ) |  |  | (36 | )
Amortization of prior service credit |  |  | — |  |  |  | — |  |  |  | (13 | ) |  |  | (13 | )
Amortization of net actuarial loss |  |  | 42 |  |  |  | 48 |  |  |  | 2 |  |  |  | 3 |
Settlements(1) |  |  | 2 |  |  |  | — |  |  |  | — |  |  |  | — |
Net periodic benefit cost (credit) |  | $ | 5 |  |  | $ | 7 |  |  | $ | (24 | ) |  | $ | (25 | )
Nine Months Ended September 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 121 |  |  | $ | 118 |  |  | $ | 20 |  |  | $ | 20 |
Interest cost |  |  | 296 |  |  |  | 253 |  |  |  | 51 |  |  |  | 42 |
Expected return on plan assets |  |  | (530 | ) |  |  | (498 | ) |  |  | (105 | ) |  |  | (107 | )
Amortization of prior service cost (credit) |  |  | 1 |  |  |  | 1 |  |  |  | (39 | ) |  |  | (39 | )
Amortization of net actuarial loss |  |  | 124 |  |  |  | 145 |  |  |  | 9 |  |  |  | 8 |
Settlements and curtailment(1) |  |  | 75 |  |  |  | — |  |  |  | 42 |  |  |  | — |
Net periodic benefit cost (credit) |  | $ | 87 |  |  | $ | 19 |  |  | $ | (22 | ) |  | $ | (76 | )
(1) | Primarily related to a voluntary retirement program.
Voluntary Retirement Program In March 2019, the Companies announced a voluntary retirement program to employees that meet certain age and service requirements. The voluntary retirement program will not compromise safety or the Companies’ ability to comply with applicable laws and regulations. In the second quarter of 2019, upon the determinations made concerning the number of employees that elected to participate in the program, Dominion Energy recorded a charge of $423 million ($316 million after-tax) included within other operations and maintenance expense ($288 million), other taxes ($23 million) and other income ($112 million), Virginia Power recorded a charge of $194 million ($144 million after-tax) included within other operations and maintenance expense ($186 million) and other taxes ($8 million) and Dominion Energy Gas recorded a charge of $63 million ($48 million after-tax) included within other operations and maintenance expense ($59 million), other taxes ($3 million) and other income ($1 million) in the respective Consolidated Statements of Income. In the second quarter of 2019, Dominion Energy and Dominion Energy Gas remeasured their pension and other postretirement benefit plans as a result of the voluntary retirement program. The remeasurement resulted in an increase in the pension benefit obligation of $484 million and $32 million and an increase in the fair value of the pension plan assets of $671 million and $146 million for Dominion Energy and Dominion Energy Gas, respectively. In addition, the remeasurement resulted in an increase in the accumulated postretirement benefit obligation of $101 million and $8 million and an increase in the fair value of the other postretirement benefit plan assets of $156 million and $29 million for Dominion Energy and Dominion Energy Gas, respectively. The impact of the remeasurement on net periodic benefit cost (credit) was recognized prospectively from the remeasurement date. The remeasurement is expected to increase the net periodic benefit credit for 2019 by approximately $6 million and $4 million for Dominion Energy and Dominion Energy Gas, respectively, excluding the impacts of curtailments. The discount rate used for the remeasurement was 4.07% - 4.10% for the Dominion Energy pension plans, 4.10% for Dominion Energy Gas pension plans, 4.05% - 4.08% for the Dominion Energy other postretirement benefit plans, and 4.05% for the Dominion Energy Gas other postretirement benefit plans. All other assumptions used for the remeasurement were consistent with the measurement as of December 31, 2018. In the third quarter of 2019, Dominion Energy remeasured a pension plan as a result of a settlement from the voluntary retirement program at SCANA. The settlement and related remeasurement resulted in an increase in the pension benefit obligation of $37 million and an increase in the fair value of the pension plan assets of $51 million for Dominion Energy. The impact of the remeasurement on net periodic benefit cost (credit) was recognized prospectively from the remeasurement date. The remeasurement is expected to increase the net periodic benefit credit for 2019 by $7 million. The discount rate used for the remeasurement was 3.57%. All other assumptions used for the remeasurement were consistent with the measurement as of December 31, 2018. Employer Contributions During the nine months ended September 30, 2019, Dominion Energy made no contributions to its defined benefit pension plans or other postretirement benefit plans. Dominion Energy made a contribution of $21 million to its defined benefit pension plans in October 2019 and expects to make a $12 million contribution to its other postretirement benefit plans through VEBAs during the remainder of 2019. Dominion Energy Gas Dominion Energy Gas participates in certain Dominion Energy benefit plans as described in Note 21 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2018. See Note 20 for more information. 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 September 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 4 |  |  | $ | 4 |  |  | $ | — |  |  | $ | 1 |
Interest cost |  |  | 7 |  |  |  | 7 |  |  |  | 3 |  |  |  | 3 |
Expected return on plan assets |  |  | (38 | ) |  |  | (36 | ) |  |  | (6 | ) |  |  | (7 | )
Amortization of prior service credit |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Amortization of net actuarial loss |  |  | 5 |  |  |  | 4 |  |  |  | — |  |  |  | — |
Net periodic benefit credit |  | $ | (22 | ) |  | $ | (21 | ) |  | $ | (4 | ) |  | $ | (4 | )
Nine Months Ended September 30, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 12 |  |  | $ | 13 |  |  | $ | 2 |  |  | $ | 3 |
Interest cost |  |  | 23 |  |  |  | 21 |  |  |  | 8 |  |  |  | 8 |
Expected return on plan assets |  |  | (116 | ) |  |  | (111 | ) |  |  | (20 | ) |  |  | (21 | )
Amortization of prior service credit |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | (3 | )
Amortization of net actuarial loss |  |  | 15 |  |  |  | 14 |  |  |  | 2 |  |  |  | 2 |
Curtailment(1) |  |  | 1 |  |  |  | — |  |  |  | 1 |  |  |  | — |
Net periodic benefit credit |  | $ | (65 | ) |  | $ | (63 | ) |  | $ | (10 | ) |  | $ | (11 | )
(1) | Related to a voluntary retirement program.
Employer Contributions During the nine months ended September 30, 2019, Dominion Energy Gas made no contributions to its defined benefit pension plans or other postretirement benefit plans. Dominion Energy Gas expects to contribute approximately $12 million to its other postretirement benefit plans through VEBAs during the remainder of 2019.

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