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Summary of Significant Accounting Policies and Other Matters (Tables) | 12 Months Ended
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Dec. 31, 2024
Accounting Policies [Abstract] |
Schedule of Total Excise Taxes Recorded in Operating Revenues | Total excise taxes (inclusive of gross receipts taxes) recorded in operating revenues were as follows:
| For the Years Ended December 31,
(Millions of Dollars) | 2024 |  | 2023 |  | 2022
Con Edison | $437 |  | $409 |  | $400
CECONY | 425 |  | 396 |  | 387
Capitalized Cost of Utility Plant | December 31, 2024 and 2023, was as follows:
| Con Edison |  | CECONY
(Millions of Dollars) | 2024 |  | 2023 |  | 2024 |  | 2023
Electric |  |  |  |  |  |  |
Generation | $577 |  | $580 |  | $577 |  | $580
Transmission | 5,072 |  | 4,652 |  | 4,703 |  | 4,333
Distribution | 25,129 |  | 24,491 |  | 23,770 |  | 23,238
General | 174 |  | 141 |  | 174 |  | 141 |
Gas (a) | 12,703 |  | 12,023 |  | 11,830 |  | 11,226
Steam | 2,006 |  | 1,990 |  | 2,006 |  | 1,990
General | 3,249 |  | 3,158 |  | 2,940 |  | 2,860
Held for future use | 77 |  | 118 |  | 69 |  | 110
Construction work in progress | 3,165 |  | 2,442 |  | 2,912 |  | 2,168
Net Utility Plant | $52,152 |  | $49,594 |  | $48,981 |  | $46,646
(a) Primarily distribution.
Schedule of Other Deferred Charges and Noncurrent Assets and Prepayments | Other deferred charges and noncurrent assets and prepayments, net of accumulated depreciation, included the following related to implementation costs incurred in cloud computing arrangements:
| Con Edison | CECONY |
(Millions of Dollars) | 2024 | 2023 | 2024 | 2023 |
Prepayments (a)(b) | $57 | $50 | $54 | $49 |
Other Deferred Charges and Noncurrent Assets (a)(b) | 254 | 179 | 243 | 178 |
(a) Amortization on these assets is computed using the straight-line method for financial statement purposes over their estimated useful lives. (b) Amortization expense related to these assets incurred during the year ended December 31, 2024 for Con Edison and CECONY was $33 million and $32 million, respectively, for the year ended December 31, 2023 for Con Edison and CECONY was $21 million and $20 million, respectively, and for the year ended December 31, 2022 for Con Edison and CECONY was $15 million and $14 million, respectively. Accumulated amortization related to these assets for Con Edison and CECONY was $91 million and $85 million, respectively at December 31, 2024 and was $58 million and $53 million, respectively at December 31, 2023.
Schedule of Investment Assets | The following investment assets are included in the Companies' consolidated balance sheets at December 31, 2024 and 2023:
| Con Edison |  | CECONY
(Millions of Dollars) | 2024 |  | 2023 |  | 2024 |  | 2023
Supplemental retirement income plan assets (b) | $583 |  | $524 |  | $560 |  | $502
Con Edison Transmission's investment in New York Transco (d) | 254 |  | 221 |  | — |  | — |
Con Edison Transmission's investment in MVP (a) (d) | 166 |  | 144 |  | — |  | —
Deferred income plan assets | 116 |  | 99 |  | 116 |  | 99
Virginia Tax Equity Projects (c) | 4 |  | 8 |  | — |  | — |
Other | 3 |  | 3 |  | 8 |  | 7
Total investments | $1,126 |  | $999 |  | $684 |  | $608
(a)At December 31, 2024 and 2023, Con Edison Transmission's cash investment in MVP was $530 million. In June 2024, MVP entered service at an overall project cost of approximately $8,100 million excluding allowance for funds used during construction. See "Investment in Mountain Valley Pipeline, LLC (MVP)" above. (b)See Note E. (c)See Note S. (d)At December 31, 2024 and 2023, Con Edison had undistributed earnings from MVP of $127 million and $114 million, respectively, and undistributed earnings from New York Transco of $16 million and $13 million, respectively.
Basic and Diluted EPS | Basic and diluted EPS for Con Edison are calculated as follows:
| For the Years Ended December 31,
(Millions of Dollars, except per share amounts/Shares in Millions) | 2024 |  | 2023 |  | 2022
Net income for common stock | $1,820 |  | $2,519 |  | $1,660
Weighted average common shares outstanding – basic | 346.0 |  | 347.7 |  | 354.5
Add: Incremental shares attributable to effect of potentially dilutive securities | 1.3 |  | 1.6 |  | 1.3
Adjusted weighted average common shares outstanding – diluted | 347.3 |  | 349.3 |  | 355.8
Net Income per common share – basic | $5.26 |  | $7.25 |  | $4.68
Net Income per common share – diluted | $5.24 |  | $7.21 |  | $4.66
Restrictions on Cash and Cash Equivalents | At December 31, 2024 and 2023, cash, temporary cash investments and restricted cash for Con Edison were as follows; CECONY did not have material restricted cash balances as of December 31, 2024 and 2023:
| At December 31,
| Con Edison
(Millions of Dollars) | 2024 | 2023
Cash and temporary cash investments | $1,324 | $1,189
Restricted cash (a) | 9 | 6
Total cash, temporary cash investments and restricted cash | $1,333 | $1,195
(a)On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note W. Con Edison retained one deferred project, Broken Bow II, a 75 MW nameplate capacity wind power project located in Nebraska. Con Edison's restricted cash for the 2023 and 2024 periods primarily include restricted cash of Broken Bow II, which was held for sale as of December 31, 2024. Broken Bow II was sold and transferred in January 2025. See Note W and Note X.
Schedule of Cash and Cash Equivalents | At December 31, 2024 and 2023, cash, temporary cash investments and restricted cash for Con Edison were as follows; CECONY did not have material restricted cash balances as of December 31, 2024 and 2023:
| At December 31,
| Con Edison
(Millions of Dollars) | 2024 | 2023
Cash and temporary cash investments | $1,324 | $1,189
Restricted cash (a) | 9 | 6
Total cash, temporary cash investments and restricted cash | $1,333 | $1,195
(a)On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note W. Con Edison retained one deferred project, Broken Bow II, a 75 MW nameplate capacity wind power project located in Nebraska. Con Edison's restricted cash for the 2023 and 2024 periods primarily include restricted cash of Broken Bow II, which was held for sale as of December 31, 2024. Broken Bow II was sold and transferred in January 2025. See Note W and Note X.

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