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v3.21.1

Financial Information by Business Segment (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Segment Reporting Information [Line Items] |  |
Total revenues | $ 3,677 | $ 3,234
Depreciation and amortization | 497 | 470
Operating income/(loss) | 860 | 808
Clean Energy Businesses |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 58 | 57
Operating income/(loss) | 28 | 14
Con Edison Transmission |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 0 | 1
Operating income/(loss) | (3) | (2)
CECONY |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 3,205 | 2,854
Depreciation and amortization | 415 | 390
Operating income/(loss) | 786 | 742
CECONY | Electric |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 315 | 297
Operating income/(loss) | 247 | 282
CECONY | Gas |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 77 | 71
Operating income/(loss) | 439 | 369
CECONY | Steam |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 23 | 22
Operating income/(loss) | 100 | 91
O&R |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 24 | 22
Operating income/(loss) | 49 | 55
O&R | Electric |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 17 | 16
Operating income/(loss) | 9 | 14
O&R | Gas |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 7 | 6
Operating income/(loss) | 40 | 41
Operating segment |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 3,677 | 3,234
Operating segment | Clean Energy Businesses |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 224 | 146
Operating segment | Con Edison Transmission |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 1 | 1
Operating segment | CECONY |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 3,205 | 2,854
Operating segment | CECONY | Electric |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 1,968 | 1,770
Operating segment | CECONY | Gas |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 973 | 834
Operating segment | CECONY | Steam |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 264 | 250
Operating segment | O&R |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 248 | 233
Operating segment | O&R | Electric |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 145 | 136
Operating segment | O&R | Gas |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 103 | 97
Other |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (1) | 0
Depreciation and amortization | 0 | 0
Operating income/(loss) | 0 | (1)
Inter-segment | CECONY |  |
Segment Reporting Information [Line Items] |  |
Total revenues | (25) | (25)
Inter-segment | CECONY | Electric |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 4 | 4
Inter-segment | CECONY | Gas |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 2 | 2
Inter-segment | CECONY | Steam |  |
Segment Reporting Information [Line Items] |  |
Total revenues | $ 19 | $ 19

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