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Commitment and Contingencies (Schedule of Long Term Purchase Commitments) (Detail) - Virginia Electric and Power Company - Purchased electric capacity $ in Millions | Dec. 31, 2019 USD ($) | [1]
--- | --- | ---
Long-term Purchase Commitment [Line Items] |
2020 | $ 45
2021 | 44
2022 | 44
2023 | 44
2024 | 44
Thereafter | 494
Total | $ 715
[1] | Commitments represent estimated amounts payable for energy under power purchase contracts with qualifying facilities which expire at various dates through 2046. Energy payments are generally based on fixed dollar amounts per month and totaled $29 million for the year ended December 31, 2019.

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