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Financial Information by Business Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | $ 14,663 | $ 15,670 | $ 13,676
Depreciation and amortization | 2,031 | 2,056 | 2,032
Operating income | 3,196 | 2,624 | 2,826
Other Income (deductions) | 830 | 326 | (538)
Interest charges | 1,023 | 852 | 905
Income Tax Expense | 487 | 498 | 190
Total assets | 66,331 | 69,065 | 63,116
Capital expenditures | 4,509 | 4,465 | 3,964
CECONY |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 13,476 | 13,268 | 11,716
Depreciation and amortization | 1,924 | 1,778 | 1,705
Operating income | 2,177 | 2,135 | 2,460
Other Income (deductions) | 732 | 332 | (108)
Total assets | 61,600 | 57,445 |
Operating segment | Clean Energy Businesses |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 129 | 1,319 | 1,022
Depreciation and amortization | 0 | 178 | 231
Operating income | 37 | 368 | 236
Other Income (deductions) | 1 | 3 | (10)
Interest charges | 16 | (35) | 68
Income Tax Expense | 3 | 84 | 44
Total assets | 0 | 7,224 | 6,554
Capital expenditures | 81 | 399 | 298
Operating segment | Con Edison Transmission |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 4 | 4 | 4
Depreciation and amortization | 1 | 1 | 1
Operating income | (9) | (10) | (16)
Other Income (deductions) | 62 | 19 | (407)
Interest charges | 2 | 5 | 9
Income Tax Expense | 14 | 5 | (114)
Total assets | 414 | 314 | 249
Capital expenditures | 49 | 65 | 31
Operating segment | CECONY |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 13,476 | 13,268 | 11,716
Depreciation and amortization | 1,924 | 1,778 | 1,705
Operating income | 2,177 | 2,135 | 2,460
Other Income (deductions) | 732 | 332 | (108)
Interest charges | 945 | 822 | 762
Income Tax Expense | 358 | 255 | 246
Total assets | 61,600 | 57,445 | 52,655
Capital expenditures | 4,083 | 3,758 | 3,418
Operating segment | CECONY | Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 10,078 | 9,751 | 8,806
Depreciation and amortization | 1,395 | 1,315 | 1,286
Operating income | 1,568 | 1,496 | 1,802
Other Income (deductions) | 564 | 259 | (84)
Interest charges | 674 | 582 | 542
Income Tax Expense | 217 | 134 | 146
Total assets | 42,226 | 39,153 | 36,260
Capital expenditures | 2,909 | 2,522 | 2,189
Operating segment | CECONY | Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 2,829 | 2,924 | 2,378
Depreciation and amortization | 429 | 367 | 326
Operating income | 682 | 660 | 646
Other Income (deductions) | 122 | 52 | (16)
Interest charges | 227 | 198 | 179
Income Tax Expense | 159 | 140 | 109
Total assets | 16,343 | 15,361 | 13,748
Capital expenditures | 1,046 | 1,128 | 1,126
Operating segment | CECONY | Steam |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 569 | 593 | 532
Depreciation and amortization | 100 | 96 | 93
Operating income | (73) | (21) | 12
Other Income (deductions) | 46 | 21 | (8)
Interest charges | 44 | 42 | 41
Income Tax Expense | (18) | (19) | (9)
Total assets | 3,031 | 2,931 | 2,647
Capital expenditures | 128 | 108 | 103
Operating segment | O&R |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 1,056 | 1,085 | 941
Depreciation and amortization | 106 | 98 | 95
Operating income | 126 | 136 | 150
Other Income (deductions) | 49 | 23 | (12)
Interest charges | 51 | 46 | 42
Income Tax Expense | 28 | 25 | 21
Total assets | 3,675 | 3,511 | 3,292
Capital expenditures | 296 | 243 | 217
Operating segment | O&R | Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 759 | 773 | 681
Depreciation and amortization | 76 | 71 | 69
Operating income | 85 | 94 | 100
Other Income (deductions) | 37 | 17 | (8)
Interest charges | 32 | 29 | 27
Income Tax Expense | 20 | 17 | 14
Total assets | 2,329 | 2,247 | 2,123
Capital expenditures | 211 | 167 | 147
Operating segment | O&R | Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 297 | 312 | 260
Depreciation and amortization | 30 | 27 | 26
Operating income | 41 | 42 | 50
Other Income (deductions) | 12 | 6 | (4)
Interest charges | 19 | 17 | 15
Income Tax Expense | 8 | 8 | 7
Total assets | 1,346 | 1,264 | 1,169
Capital expenditures | 85 | 76 | 70
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | (2) | (6) | (7)
Depreciation and amortization | 0 | 1 | 0
Operating income | 865 | (5) | (4)
Other Income (deductions) | (14) | (51) | (1)
Interest charges | 9 | 14 | 24
Income Tax Expense | 84 | 129 | (7)
Total assets | 642 | 571 | 366
Capital expenditures | 0 | 0 | 0
Inter- segment revenues | CECONY |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | (100) | (103) | (100)
Inter- segment revenues | CECONY | Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 18 | 19 | 18
Inter- segment revenues | CECONY | Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | 8 | 8 | 8
Inter- segment revenues | CECONY | Steam |  |  |
Segment Reporting Information [Line Items] |  |  |
Cost of services provided | $ 74 | $ 76 | $ 74

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