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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | $ 3,300 | $ 2,773 | $ 7,551 | $ 6,996
Total revenues | 3,220 | 2,944 | 7,495 | 7,347
Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (80) | 171 | (56) | 351
CECONY |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 2,996 | 2,744 | 6,967 | 6,697
Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,220 | 2,944 | 7,495 | 7,347
Operating Segments | Clean Energy Businesses |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers |  |  | 0 | 82
Total revenues |  |  | 0 | 129
Operating Segments | Clean Energy Businesses | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  |  | 0 | 47
Operating Segments | Clean Energy Businesses | Renewables |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers |  |  | 0 | 68
Total revenues |  |  | 0 | 68
Operating Segments | Clean Energy Businesses | Renewables | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  |  | 0 | 0
Operating Segments | Clean Energy Businesses | Energy services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers |  |  | 0 | 7
Total revenues |  |  | 0 | 7
Operating Segments | Clean Energy Businesses | Energy services | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  |  | 0 | 0
Operating Segments | Clean Energy Businesses | Develop/Transfer Projects |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers |  |  | 0 | 7
Total revenues |  |  | 0 | 7
Operating Segments | Clean Energy Businesses | Develop/Transfer Projects | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  |  | 0 | 0
Operating Segments | Clean Energy Businesses | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers |  |  | 0 | 0
Total revenues |  |  | 0 | 47
Operating Segments | Clean Energy Businesses | Other | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  |  | 0 | 47
Operating Segments | Con Edison Transmission |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1 | 1 | 2 | 2
Total revenues | 1 | 1 | 2 | 2
Operating Segments | Con Edison Transmission | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | CECONY | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 3,058 | 2,577 | 7,003 | 6,401
Total revenues | 2,996 | 2,744 | 6,967 | 6,697
Operating Segments | CECONY | Other revenues | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (62) | 167 | (36) | 296
Operating Segments | CECONY | Electric | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 2,381 | 1,991 | 4,807 | 4,254
Total revenues | 2,370 | 2,144 | 4,812 | 4,500
Operating Segments | CECONY | Electric | Other revenues | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (11) | 153 | 5 | 246
Operating Segments | CECONY | Gas | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 587 | 521 | 1,812 | 1,779
Total revenues | 538 | 531 | 1,781 | 1,822
Operating Segments | CECONY | Gas | Other revenues | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (49) | 10 | (31) | 43
Operating Segments | CECONY | Steam | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 90 | 65 | 384 | 368
Total revenues | 88 | 69 | 374 | 375
Operating Segments | CECONY | Steam | Other revenues | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (2) | 4 | (10) | 7
Operating Segments | O&R | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 241 | 195 | 546 | 511
Total revenues | 224 | 200 | 527 | 521
Operating Segments | O&R | Other revenues | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (17) | 5 | (19) | 10
Operating Segments | O&R | Electric | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 189 | 154 | 379 | 332
Total revenues | 180 | 159 | 370 | 341
Operating Segments | O&R | Electric | Other revenues | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (9) | 5 | (9) | 9
Operating Segments | O&R | Gas | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 52 | 41 | 167 | 179
Total revenues | 44 | 41 | 157 | 180
Operating Segments | O&R | Gas | Other revenues | Subsidiaries |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | (8) | 0 | (10) | 1
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Total revenues | (1) | (1) | (1) | (2)
Other | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ (1) | $ (1) | $ (1) | $ (2)

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