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Revenue Recognition | 9 Months Ended
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Sep. 30, 2023
Revenue from Contract with Customer [Abstract] |
Revenue Recognition | Revenue Recognition The following table presents, for the three and nine months ended September 30, 2023 and 2022, revenue from contracts with customers as defined in Accounting Standards Codification Topic 606, "Revenue from Contracts with Customers," as well as additional revenue from sources other than contracts with customers, disaggregated by major source.
| For the Three Months Ended September 30, 2023 | For the Three Months Ended September 30, 2022
(Millions of Dollars) | Revenues from contracts with customers |  | Other revenues (a) | Total operating revenues | Revenues from contracts with customers |  | Other revenues (a) | Total operating revenues
CECONY |  |  |  |  |  |  |  |
Electric | $3,195 |  | $28 | $3,223 | $3,165 |  | $(88) | $3,077
Gas | 338 |  | (20) | 318 | 409 |  | 5 | 414
Steam | 46 |  | 3 | 49 | 55 |  | 3 | 58
Total CECONY | $3,579 |  | $11 | $3,590 | $3,629 |  | $(80) | $3,549
O&R |  |  |  |  |  |  |  |
Electric | 242 |  | 4 | 246 | 256 |  | (4) | 252
Gas | 31 |  | 4 | 35 | 29 |  | 10 | 39
Total O&R | $273 |  | $8 | $281 | $285 |  | $6 | $291
Clean Energy Businesses (c) |  |  |  |  |  |  |  |
Renewables | — |  | — | — | 197 |  | — |  | 197
Energy services | — |  | — | — | 13 |  | — |  | 13
Develop/Transfer Projects | — |  | — | — | 37 |  | — |  | 37 |
Other | — |  | — | — | — |  |  | 78 |  | 78 |
Total Clean Energy Businesses | $— |  | $— | $— | $247 |  | $78 |  | $325
Con Edison Transmission | 1 |  | — | 1 | 1 |  | — |  | 1
Other (b) | — |  | — | — | — |  |  | (1) | (1)
Total Con Edison | $3,853 |  | $19 | $3,872 | $4,162 |  | $3 | $4,165
(a) For the Utilities, this includes primarily revenue or negative revenue adjustments from alternative revenue programs, such as the revenue decoupling mechanisms under their New York electric and gas rate plans (see "Rate Plans" in Note B). For the Clean Energy Businesses, this includes revenue from wholesale services. On March 1, 2023, Con Edison completed the sale of substantially all of the assets of the Clean Energy Businesses. See Note S and Note T. (b) Other includes the parent company, Con Edison's tax equity investments, the deferred project held for sale and consolidated adjustments. See Note T. (c) On March 1, 2023, Con Edison completed the sale of substantially all of the assets of the Clean Energy Businesses. See Note S and Note T.
| For the Nine Months Ended September 30, 2023 | For the Nine Months Ended September 30, 2022
(Millions of Dollars) | Revenues from contracts with customers |  | Other revenues (a) | Total operating revenues | Revenues from contracts with customers |  | Other revenues (a) | Total operating revenues
CECONY |  |  |  |  |  |  |  |
Electric | $7,449 |  | $273 | $7,722 | $7,525 |  | $(124) | $7,401
Gas | 2,117 |  | 23 | 2,140 | 2,090 |  | 37 | 2,127
Steam | 414 |  | 11 | 425 | 436 |  | 8 | 444
Total CECONY | $9,980 |  | $307 | $10,287 | $10,051 |  | $(79) | $9,972
O&R |  |  |  |  |  |  |  |
Electric | $574 |  | $14 | $588 | $595 |  | $(1) | $594
Gas | 211 |  | 4 | 215 | 217 |  | 2 | 219
Total O&R | $785 |  | $18 | $803 | $812 |  | $1 | $813
Clean Energy Businesses (c) |  |  |  |  |  |  |  |
Renewables | $68 |  | $— | $68 | $524 |  | $— | $524
Energy services | 7 |  | — | 7 | 57 |  | — |  | 57
Develop/Transfer Projects | 7 |  | — | 7 | 56 |  | — |  | 56 |
Other | — |  | 47 | 47 | — |  |  | 220 |  | 220 |
Total Clean Energy Businesses | $82 |  | $47 | $129 | $637 |  | $220 |  | $857
Con Edison Transmission | $3 |  | $— | $3 | $3 |  | — |  | $3
Other (b) | — |  | (3) | (3) | — |  |  | (6) | (6)
Total Con Edison | $10,850 |  | $369 | $11,219 | $11,503 |  | $136 | $11,639
(a) For the Utilities, this includes primarily revenue or negative revenue adjustments from alternative revenue programs, such as the revenue decoupling mechan isms under their New York electric and gas rate plans (see "Rate Plans" in Note B). For the Clean Energy Businesses, this includes revenue from wholesale services. On March 1, 2023, Con Edison completed the sale of substantially all of the assets of the Clean Energy Businesses. See Note S and Note T. (b) Other includes the parent company, Con Edison's tax equity investments, the deferred project held for sale and consolidated adjustments. See Note T. (c) On March 1, 2023, Con Edison completed the sale of substantially all of the assets of the Clean Energy Businesses. See Note S and Note T. Use of the Percentage-of-Completion Method Sales and profits on each percentage-of-completion contract at the Clean Energy Businesses were recorded each month based on the ratio of actual cumulative costs incurred to the total estimated costs at completion of the contract, multiplied by the total estimated contract revenue, less cumulative revenues recognized in prior periods (the ‘‘cost-to-cost’’ method). The impact of revisions of contract estimates, that may result from contract modifications, performance or other reasons, were recognized on a cumulative catch-up basis in the period in which the revisions are mad e. On March 1, 2023, Con Edison completed the sale of substantially all of the assets of the Clean Energy Businesses. See Note S.
| 2023 | 2022
(Millions of Dollars) | Unbilled contract revenue (a) |  | Unearned revenue (b) |  | Unbilled contract revenue (a) | Unearned revenue (b) |
Beginning balance as of January 1, | $80 |  | $3 |  | $35 | $7 |
Additions (c) | 2 |  | — |  | 103 | — |
Subtractions (c) | 78 |  | 3 | (d) | 81 | 4 | (d)
Ending balance as of September 30, | $4 | (e) | $— |  | $57 | $3 |
(a)Unbilled contract revenue represents accumulated incurred costs and earned profits on contracts (revenue arrangements), that have been recorded as revenue, but have not yet been billed to customers, and which represent contract assets as defined in Topic 606. Substantially all accrued unbilled contract revenue is expected to be collected within one year. Unbilled contract revenue arises from the cost-to-cost method of revenue recognition. Unbilled contract revenue from fixed-price type contracts is converted to billed receivables when amounts are invoiced to customers according to contractual billing terms, that generally occur when deliveries or other performance milestones are completed. (b)Unearned revenue represents a liability for billings to customers in excess of earned revenue, that are contract liabilities as defined in Topic 606. (c)Additions for unbilled contract revenue and subtractions for unearned revenue represent additional revenue earned. Additions for unearned revenue and subtractions for unbilled contract revenue represent billings. Activity also includes appropriate balance sheet classification for the period. Of the subtractions in 2023, $21 million and $1 million relate to the sale of the Clean Energy Businesses for unbilled contract revenue and unearned revenue, respectively. See (e) below. (d)Of the subtractions from unearned revenue, $3 million and $4 million were included in the balances as of January 1, 2023 and 2022, respectively. (e)Following the sale of the Clean Energy Businesses, Con Edison received substantially all contract revenue, net of certain costs incurred, for a battery storage project located in Imperial County, California. See Note S.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-9 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-15 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org//606/tableOfContent + Details
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