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Financial Information by Business Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 13,676 | $ 12,246 | $ 12,574
Depreciation and amortization | 2,032 | 1,920 | 1,684
Operating income | 2,826 | 2,654 | 2,676
Other Income (deductions) | (538) | (401) | 51
Interest charges | 905 | 1,019 | 991
Income taxes on operating income | 340 | 193 | 300
Total assets | 63,116 | 62,895 | 58,079
Capital expenditures | 3,964 | 4,085 | 3,676
Income tax expense (benefit) on non-operating income | (150) | (103) | (4)
Parent Company |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 21,620 | 21,499 |
CECONY |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 11,716 | 10,647 | 10,821
Depreciation and amortization | 1,705 | 1,598 | 1,373
Operating income | 2,460 | 2,310 | 2,348
Other Income (deductions) | (108) | (171) | (35)
Total assets | 52,655 | 50,967 |
Income tax expense (benefit) on non-operating income | (6) | (3) | (7)
Operating segment | Clean Energy Businesses |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,022 | 736 | 857
Depreciation and amortization | 231 | 231 | 226
Operating income | 236 | 215 | 202
Other Income (deductions) | (10) | 4 | 5
Interest charges | 68 | 196 | 186
Income taxes on operating income | 44 | (43) | (58)
Total assets | 6,554 | 6,848 | 6,528
Capital expenditures | 298 | 616 | 248
Operating segment | Con Edison Transmission |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 4 | 4 | 4
Depreciation and amortization | 1 | 1 | 1
Operating income | (16) | (8) | (6)
Other Income (deductions) | (407) | (215) | 104
Interest charges | 9 | 18 | 25
Income taxes on operating income | 3 | 0 | 1
Total assets | 249 | 1,348 | 1,618
Capital expenditures | 31 | 3 | 205
Operating segment | CECONY |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 11,716 | 10,647 | 10,821
Depreciation and amortization | 1,705 | 1,598 | 1,373
Operating income | 2,460 | 2,310 | 2,348
Other Income (deductions) | (108) | (171) | (35)
Interest charges | 762 | 739 | 728
Income taxes on operating income | 252 | 218 | 342
Total assets | 52,655 | 50,967 | 46,557
Capital expenditures | 3,418 | 3,246 | 3,020
Operating segment | CECONY | Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 8,806 | 8,103 | 8,062
Depreciation and amortization | 1,286 | 1,214 | 1,053
Operating income | 1,802 | 1,731 | 1,758
Other Income (deductions) | (84) | (134) | (28)
Interest charges | 542 | 535 | 539
Income taxes on operating income | 151 | 130 | 239
Total assets | 36,260 | 35,673 | 32,988
Capital expenditures | 2,189 | 2,080 | 1,851
Operating segment | CECONY | Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 2,378 | 2,036 | 2,132
Depreciation and amortization | 326 | 294 | 231
Operating income | 646 | 574 | 528
Other Income (deductions) | (16) | (25) | (4)
Interest charges | 179 | 164 | 147
Income taxes on operating income | 110 | 102 | 99
Total assets | 13,748 | 12,678 | 11,090
Capital expenditures | 1,126 | 1,044 | 1,078
Operating segment | CECONY | Steam |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 532 | 508 | 627
Depreciation and amortization | 93 | 90 | 89
Operating income | 12 | 5 | 62
Other Income (deductions) | (8) | (12) | (3)
Interest charges | 41 | 40 | 42
Income taxes on operating income | (9) | (14) | 4
Total assets | 2,647 | 2,616 | 2,479
Capital expenditures | 103 | 122 | 91
Operating segment | O&R |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 941 | 862 | 893
Depreciation and amortization | 95 | 90 | 84
Operating income | 150 | 147 | 139
Other Income (deductions) | (12) | (14) | (11)
Interest charges | 42 | 41 | 41
Income taxes on operating income | 21 | 21 | 21
Total assets | 3,292 | 3,247 | 3,006
Capital expenditures | 217 | 220 | 203
Operating segment | O&R | Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 681 | 629 | 634
Depreciation and amortization | 69 | 65 | 60
Operating income | 100 | 99 | 98
Other Income (deductions) | (8) | (10) | (7)
Interest charges | 27 | 26 | 27
Income taxes on operating income | 13 | 13 | 15
Total assets | 2,123 | 2,097 | 2,130
Capital expenditures | 147 | 159 | 142
Operating segment | O&R | Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 260 | 233 | 259
Depreciation and amortization | 26 | 25 | 24
Operating income | 50 | 48 | 41
Other Income (deductions) | (4) | (4) | (4)
Interest charges | 15 | 15 | 14
Income taxes on operating income | 8 | 8 | 6
Total assets | 1,169 | 1,150 | 876
Capital expenditures | 70 | 61 | 61
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | (7) | (3) | (1)
Depreciation and amortization | 0 | 0 | 0
Operating income | (4) | (10) | (7)
Other Income (deductions) | (1) | (5) | (12)
Interest charges | 24 | 25 | 11
Income taxes on operating income | 20 | (3) | (6)
Total assets | 366 | 485 | 370
Capital expenditures | 0 | 0 | 0
Other | O&R |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 | 0
Depreciation and amortization | 0 | 0 | 0
Operating income | 0 | 0 | 0
Other Income (deductions) | 0 | 0 | 0
Interest charges | 0 | 0 | 0
Income taxes on operating income | 0 | 0 | 0
Total assets | 0 | 0 | 0
Capital expenditures | 0 | 0 | 0
Inter-segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 | 0
Inter-segment | Clean Energy Businesses |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 | 0
Inter-segment | CECONY |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | (100) | (99) | (94)
Inter-segment | CECONY | Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 18 | 18 | 17
Inter-segment | CECONY | Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 8 | 7 | 7
Inter-segment | CECONY | Steam |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 74 | $ 74 | $ 70

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