Short-Term Borrowing (Details)	1 Months Ended
Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Short-term Debt [Line Items]
Commercial paper, outstanding	$ 1,313,000,000	$ 1,488,000,000
Loans outstanding under the credit agreement	$ 0	$ 0
Percentage of liens of companies consolidated asset	5.00%
Maximum aggregate limit of failure to pay debt or derivative obligations	$ 150,000,000
March 2022 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement \| Revolving Credit Facility \| Subsidiaries
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 750,000,000
Ratio of consolidated debt to consolidated total capital	0.65
Commercial Paper
Short-term Debt [Line Items]
Weighted average interest rate	0.80%	0.30%
CECONY \| Subsidiaries
Short-term Debt [Line Items]
Commercial paper, outstanding	$ 1,061,000,000	$ 1,361,000,000
CECONY \| Commercial Paper \| Subsidiaries
Short-term Debt [Line Items]
Weighted average interest rate	0.80%	0.30%

Debt Instrument, Covenant Compliance, Consolidated Debt To Consolidated Total Capital Ratio

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Debt Instrument, Covenant Compliance, Maximum Aggregate Limit Of Failure To Pay Debt Or Derivative Obligations

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No definition available.

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Percentage Of Liens Of Companies Consolidated Asset

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Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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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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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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