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v3.22.2.2

Employee Benefit Plans (Net Periodic Benefit Cost (Credit)) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Pension Benefits |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Service cost |  | $ 35 | $ 43 | $ 106 | $ 127
Interest cost |  | 83 | 80 | 250 | 238
Expected return on plan assets |  | (221) | (209) | (667) | (625)
Amortization of net actuarial loss |  | 39 | 48 | 119 | 145
Settlements and curtailment | [1] |  |  |  | 5
Net periodic benefit (credit) cost |  | (64) | (38) | (192) | (110)
Other Postretirement Benefits Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Service cost |  | 5 | 6 | 16 | 18
Interest cost |  | 11 | 11 | 34 | 35
Expected return on plan assets |  | (47) | (43) | (143) | (130)
Amortization of prior service cost (credit) |  | (10) | (11) | (29) | (32)
Amortization of net actuarial loss |  |  | 1 | (1) | 3
Settlements and curtailment | [1] | (8) |  | (8) |
Net periodic benefit (credit) cost |  | $ (49) | $ (36) | $ (131) | $ (106)
[1] | 2022 amounts relate primarily to Dominion Energy’s sale of Hope. 2021 amounts relate primarily to the Dominion Energy executive nonqualified pension plan.

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