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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | $ 15,469 | $ 14,476 | $ 15,455
TOTAL OPERATING REVENUES | 15,256 | 14,663 | 15,670
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | (213) | 187 | 215
CECONY |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 14,129 | 13,476 | 13,268
Operating Segments | Clean Energy Businesses |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 82 | 998
TOTAL OPERATING REVENUES | 0 | 129 | 1,319
Operating Segments | Clean Energy Businesses | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 0 | 47 | 321
Operating Segments | Clean Energy Businesses | Renewables |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 68 | 637
TOTAL OPERATING REVENUES | 0 | 68 | 637
Operating Segments | Clean Energy Businesses | Renewables | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 0 | 0 | 0
Operating Segments | Clean Energy Businesses | Energy services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 7 | 317
TOTAL OPERATING REVENUES | 0 | 7 | 317
Operating Segments | Clean Energy Businesses | Energy services | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 0 | 0 | 0
Operating Segments | Clean Energy Businesses | Develop/Transfer Projects |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 7 | 44
TOTAL OPERATING REVENUES | 0 | 7 | 44
Operating Segments | Clean Energy Businesses | Develop/Transfer Projects | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 0 | 0 | 0
Operating Segments | Clean Energy Businesses | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 | 0
TOTAL OPERATING REVENUES | 0 | 47 | 321
Operating Segments | Clean Energy Businesses | Other | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 0 | 47 | 321
Operating Segments | Con Edison Transmission |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 4 | 4 | 4
TOTAL OPERATING REVENUES | 4 | 4 | 4
Operating Segments | Con Edison Transmission | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 0 | 0 | 0
Operating Segments | CECONY |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 14,129 | 13,476 | 13,268
Operating Segments | CECONY | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 14,350 | 13,364 | 13,376
TOTAL OPERATING REVENUES | 14,129 | 13,476 | 13,268
Operating Segments | CECONY | Other | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | (221) | 112 | (108)
Operating Segments | CECONY | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES |  | 10,078 | 9,751
Operating Segments | CECONY | Electric | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 10,868 | 9,946 | 9,917
TOTAL OPERATING REVENUES | 10,717 | 10,078 | 9,751
Operating Segments | CECONY | Electric | Other | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | (151) | 132 | (166)
Operating Segments | CECONY | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES |  | 2,829 | 2,924
Operating Segments | CECONY | Gas | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 2,890 | 2,867 | 2,875
TOTAL OPERATING REVENUES | 2,834 | 2,829 | 2,924
Operating Segments | CECONY | Gas | Other | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | (56) | (38) | 49
Operating Segments | CECONY | Steam |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES |  | 569 | 593
Operating Segments | CECONY | Steam | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 592 | 551 | 584
TOTAL OPERATING REVENUES | 578 | 569 | 593
Operating Segments | CECONY | Steam | Other | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | (14) | 18 | 9
Operating Segments | O&R |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 1,125 | 1,056 | 1,085
Operating Segments | O&R | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,115 | 1,026 | 1,077
TOTAL OPERATING REVENUES | 1,125 | 1,056 | 1,085
Operating Segments | O&R | Other | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 10 | 30 | 8
Operating Segments | O&R | Electric |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES |  | 759 | 773
Operating Segments | O&R | Electric | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 865 | 740 | 771
TOTAL OPERATING REVENUES | 852 | 759 | 773
Operating Segments | O&R | Electric | Other | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | (13) | 19 | 2
Operating Segments | O&R | Gas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES |  | 297 | 312
Operating Segments | O&R | Gas | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 250 | 286 | 306
TOTAL OPERATING REVENUES | 273 | 297 | 312
Operating Segments | O&R | Gas | Other | Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | 23 | 11 | 6
Other (b) |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 | 0
TOTAL OPERATING REVENUES | (2) | (2) | (6)
Other (b) | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
TOTAL OPERATING REVENUES | $ (2) | $ (2) | $ (6)

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