Debt instrument maturity year.

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- Definition

Defer interest payments on the hybrids.

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- Definition

Derivative imputed interest rate.

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Derivative maturity month and year.

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- Definition

Derivative maturity year.

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No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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Long-Term Debt (Narrative) (Detail) - USD ($)	1 Months Ended			12 Months Ended
Long-Term Debt (Narrative) (Detail) - USD ($)	Aug. 31, 2021	Aug. 31, 2020	Jun. 30, 2020	Dec. 31, 2023	Feb. 29, 2024	Jan. 31, 2024	Dec. 31, 2022	Aug. 31, 2022	Jul. 31, 2016	Oct. 31, 2014
Debt Instrument [Line Items]
Debt, amount redeemed	$ 39,000,000							$ 154,000,000
Period of deferral				10 days
Other long-term debt				$ 192,000,000			$ 232,000,000
Virginia Electric and Power Company
Debt Instrument [Line Items]
Other long-term debt				$ 72,000,000			$ 65,000,000
Interest Rate Swap
Debt Instrument [Line Items]
Derivative notional value			$ 2,000,000,000
Derivative maturity month and year			2024-12
Other long-term debt		$ 443,000,000	$ 326,000,000
Derivative imputed interest rate			1.19%
Interest Rate Swap \| Virginia Electric and Power Company
Debt Instrument [Line Items]
Debt, amount redeemed		448,000,000
Derivative notional value		$ 900,000,000
Derivative maturity month and year		2023-12
Derivative maturity year		2020
Derivative imputed interest rate		0.34%
Junior Subordinated Debt
Debt Instrument [Line Items]
Interest rate percentage									5.25%
Debt instrument, face amount									$ 800,000,000
October 2014 Hybrids \| Junior Subordinated Debt
Debt Instrument [Line Items]
Junior subordinated notes										$ 685,000,000
Interest rate percentage										5.75%
July2016 Hybrids \| Junior Subordinated Debt
Debt Instrument [Line Items]
Debt, amount redeemed	800,000,000
Expenses related to early redemption of hybrids	$ 23,000,000
Debt instrument maturity year	2076
Senior Notes Due in 2034 \| Virginia Electric and Power Company \| Subsequent Event
Debt Instrument [Line Items]
Interest rate percentage						5.00%
Debt instrument, face amount						$ 500,000,000
Senior Secured Deferred Fuel Cost Bonds due in May 2029 \| Virginia Electric and Power Company \| Forecast
Debt Instrument [Line Items]
Interest rate percentage					5.088%
Debt instrument, face amount					$ 439,000,000
Senior Secured Deferred Fuel Cost Bonds due in May 2033 \| Virginia Electric and Power Company \| Forecast
Debt Instrument [Line Items]
Interest rate percentage					4.877%
Debt instrument, face amount					$ 843,000,000
Senior Notes Due in 2054 \| Virginia Electric and Power Company \| Subsequent Event
Debt Instrument [Line Items]
Interest rate percentage						5.35%
Debt instrument, face amount						$ 500,000,000