Debt instrument maturity year.

No definition available.

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- Definition

Defer interest payments on the hybrids.

+ References

No definition available.

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- Definition

Derivative imputed interest rate.

+ References

No definition available.

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- Definition

Derivative maturity month and year.

+ References

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

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

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- Definition

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

+ References

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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.

+ References

No definition available.

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- Definition

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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- Definition

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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- Definition

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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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Long-Term Debt (Narrative) (Detail) - USD ($)		1 Months Ended						12 Months Ended
Long-Term Debt (Narrative) (Detail) - USD ($)	Oct. 01, 2024	Aug. 31, 2021	Aug. 31, 2020	Jun. 30, 2020	Feb. 29, 2020	Sep. 30, 2006	Jun. 30, 2006	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 31, 2022	Jul. 31, 2016	Oct. 31, 2014
Debt Instrument [Line Items]
Debt, amount redeemed		$ 39,000,000
Repayments of Long-term Debt								$ 3,750,000,000	$ 2,879,000,000	$ 9,116,000,000
Period of deferral								10 days
Other long-term debt								$ 850,000,000	881,000,000
Interest Rate Swap
Debt Instrument [Line Items]
Derivative notional value				$ 2,000,000,000.0
Derivative maturity month and year				2024-12
Other long-term debt				$ 326,000,000
Derivative imputed interest rate				1.19%
Interest Rate Swap \| Virginia Power
Debt Instrument [Line Items]
Derivative notional value			$ 900,000,000
Derivative maturity month and year			2023-12
Other long-term debt			$ 443,000,000
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
June 2006 Hybrids
Debt Instrument [Line Items]
Debt, amount redeemed										12,000,000
Junior subordinated notes							$ 300,000,000
Repayments of Long-term Debt					$ 111,000,000
June 2006 Hybrids \| LIBOR
Debt Instrument [Line Items]
Spread on variable percentage rate							2.825%
September 2006 Hybrids
Debt Instrument [Line Items]
Junior subordinated notes						$ 500,000,000
Debt instrument, face amount										$ 13,000,000
Repayments of Long-term Debt					$ 286,000,000
September 2006 Hybrids \| LIBOR
Debt Instrument [Line Items]
Spread on variable percentage rate						2.30%
June 2006 and September 2006 Hybrids \| Interest and Related Charges
Debt Instrument [Line Items]
Expenses related to early redemption of hybrids									$ 10,000,000
October 2014 Hybrids \| Junior Subordinated Debt
Debt Instrument [Line Items]
Interest rate percentage													5.75%
Debt instrument, face amount													$ 685,000,000
Senior Notes Due in 2032 \| Subsequent Event
Debt Instrument [Line Items]
Debt, amount redeemed											$ 600,000,000
Interest rate percentage											2.40%
Senior Notes Due in 2051 \| Subsequent Event
Debt Instrument [Line Items]
Debt, amount redeemed											$ 400,000,000
Interest rate percentage											2.95%
July2016 Hybrids \| Junior Subordinated Debt
Debt Instrument [Line Items]
Debt, amount redeemed		800,000,000
Debt instrument, face amount		800,000,000
Expenses related to early redemption of hybrids		$ 23,000,000
Debt instrument maturity year		2076
July2016 Hybrids \| October 2014 Hybrids \| Scenario, Forecast
Debt Instrument [Line Items]
Spread on variable percentage rate	3.057%