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Revenue Recognition - Change in Unbilled Contract and Unearned Revenues (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | Jan. 01, 2023
Unbilled contract revenue |  |  |  |
Beginning balance | $ 4 | $ 80 | $ 80 |
Additions | 0 | 2 |  |
Subtractions | 0 | 67 |  |
Ending balance | 4 | 15 | 4 |
Unearned revenue |  |  |  |
Beginning balance | 0 | 3 | 3 |
Additions | 0 | 0 |  |
Subtractions | 0 | 3 |  |
Ending balance | $ 0 | $ 0 | 0 |
Contracts with customer, revenue recognized, amount outstanding end of last period |  |  |  | $ 3
Clean Energy Businesses |  |  |  |
Unbilled contract revenue |  |  |  |
Subtractions |  |  | 21 |
Unearned revenue |  |  |  |
Subtractions |  |  | $ 1 |

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- Definition Contract With Customer Liability, Revenue Recognized, Previously Outstanding + References No definition available. + Details
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- Definition Contract with Customer, Liability, Decrease From Billings + References No definition available. + Details
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Namespace Prefix: | ed_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Unbilled Contracts Receivable, Decrease From Billings + References No definition available. + Details
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- Definition Unbilled Contracts Receivable, Revenue Recognized + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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- Definition Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 912 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478345/912-310-45-2 + Details
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- Details
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