Equity Method Investment, Ownership Percentage, Expected Increase (Decrease)

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Gain (Loss) On Commodity Contracts

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Generating Capacity Per Day

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Maximum Amount Of Funding

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Outstanding Loan

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Related Party Transaction, Lending Period

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Sales Of Natural Gas Propane Ngls And Condensate And Affiliates

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Term Of Contract

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Amount of net assets (liabilities).

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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The amount of any current tax-related balances due to affiliates as of the date of each statement of financial position presented.

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Amount of transactions with related party during the financial reporting period.

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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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Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Related Party Transactions - Additional Information (Details) MMBTU in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) MMBTU	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Net assets	$ 20,378,000,000		$ 20,037,000,000
Subsidiaries
Related Party Transaction [Line Items]
Net assets	16,618,000,000	$ 15,192,000,000	16,312,000,000	$ 14,849,000,000
CECONY
Related Party Transaction [Line Items]
Sale of natural gas	45,000,000	27,000,000
Income taxes due to Con Edison	9,000,000		$ 10,000,000
Funding limit of CECONY to O&R (not to exceed)	250,000,000
CECONY \| Subsidiaries
Related Party Transaction [Line Items]
Net assets	$ 16,618,000,000
CECONY \| Related Party, Lending of Funds
Related Party Transaction [Line Items]
Lending period (not more than) (months)	12 months
CECONY \| Equity Method Investee \| Mountain Valley Pipeline LLC
Related Party Transaction [Line Items]
Amount of transaction	$ 0	0
Contract term (years)	20 years
Generating capacity per day (in dekatherms) \| MMBTU	250
CECONY \| Equity Method Investee \| Stagecoach Gas Services LLC \| Purchased Power Costs
Related Party Transaction [Line Items]
Amount of transaction		$ 8,000,000
Percentage of equity interest owned			50.00%
CECONY \| Affiliated Entity \| Financial Electric Capacity Contract \| Con Edison Energy
Related Party Transaction [Line Items]
Loss on financial electric capacity contracts	$ 2,000,000
O&R
Related Party Transaction [Line Items]
Net assets	903,000,000
Outstanding loans	$ 0		$ 0
CET Electric \| NY Transco
Related Party Transaction [Line Items]
Ownership interest, percentage	45.70%
Amounts billed	$ 1,000,000
Con Edison Gas Pipeline and Storage, LLC \| Mountain Valley Pipeline LLC
Related Party Transaction [Line Items]
Percentage of equity interest owned	10.00%		10.20%	11.30%
Equity Method Investment, Ownership Percentage, Expected Increase (Decrease)	8.00%