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Current Expected Credit Losses - Additional Information (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Increasein allowance for uncollectible accounts | $ 620
Threshold period past due, trade accounts receivable, writeoff | 90 days
Subsidiaries | CECONY |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Increasein allowance for uncollectible accounts | $ 605

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