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Significant Accounting Policies (Checks the Outstanding Accounts Payable but not yet Presented for Payment and Recorded) (Parenthetical) (Detail) $ in Millions	Dec. 31, 2023 USD ($)
Accounts Payable [Line Items]
Accounts payable checks liabilities held for sale	$ 19

X

- Definition

Accounts payable checks liabilities held for sale

+ References

No definition available.

+ Details

Name:	d_AccountsPayableChecksLiabilitiesHeldForSale
Namespace Prefix:	d_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Accounts Payable [Line Items]

+ References

No definition available.

+ Details

Name:	d_AccountsPayableLineItems
Namespace Prefix:	d_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration