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Regulatory Matters - Regulatory Assets (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | $ 4,334 | $ 3,974
Regulatory assets – current | 180 | 305
Total Regulatory Assets | 4,514 | 4,279
Unrecognized pension and other postretirement costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 125 | 78
Environmental remediation costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 983 | 991
Revenue taxes |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 468 | 436
Deferred storm costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 221 | 270
Municipal infrastructure support costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 20 | 29
Brooklyn Queens Demand Management (BQDM) program |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 31 | 33
Meadowlands heater odorization project |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 24 | 27
Recoverable Demonstration project costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 18 | 17
Gate station upgrade project |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 14 | 14
System peak reduction and energy efficiency programs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 868 | 783
Unamortized loss on reacquired debt |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 9 | 11
Deferred derivative losses - long term |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 99 | 31
Property tax reconciliation |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 195 | 121
Legacy meters |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 17 | 20
Gas service line deferred costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 49 | 99
COVID - 19 customer arrears relief programs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 418 | 104
Pension and other postretirement benefits deferrals |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 56 | 279
Preferred stock redemption |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 18 | 19
MTA power reliability deferral |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 69 | 92
Non-wire alternative projects |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 20 | 22
COVID - 19 pandemic deferrals |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 333 | 292
Electric vehicle make ready |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 59 | 33
Other |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 220 | 173
Deferred derivative losses - short term |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – current | 137 | 184
Recoverable energy costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – current | 43 | 121
CECONY |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 4,057 | 3,669
Regulatory assets – current | 163 | 286
CECONY | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 4,057 | 3,669
Regulatory assets – current | 163 | 286
Total Regulatory Assets | 4,220 | 3,955
CECONY | Unrecognized pension and other postretirement costs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 125 | 78
CECONY | Environmental remediation costs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 899 | 906
CECONY | Revenue taxes | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 448 | 417
CECONY | Deferred storm costs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 129 | 173
CECONY | Municipal infrastructure support costs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 20 | 29
CECONY | Brooklyn Queens Demand Management (BQDM) program | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 31 | 33
CECONY | Meadowlands heater odorization project | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 24 | 27
CECONY | Recoverable Demonstration project costs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 18 | 16
CECONY | Gate station upgrade project | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 14 | 14
CECONY | System peak reduction and energy efficiency programs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 860 | 780
CECONY | Unamortized loss on reacquired debt | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 8 | 10
CECONY | Deferred derivative losses - long term | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 89 | 26
CECONY | Property tax reconciliation | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 195 | 121
CECONY | Legacy meters | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 0 | 0
CECONY | Gas service line deferred costs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 49 | 99
CECONY | COVID - 19 customer arrears relief programs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 415 | 101
CECONY | Pension and other postretirement benefits deferrals | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 41 | 240
CECONY | Preferred stock redemption | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 18 | 19
CECONY | MTA power reliability deferral | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 69 | 92
CECONY | Non-wire alternative projects | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 20 | 22
CECONY | COVID - 19 pandemic deferrals | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 329 | 288
CECONY | Electric vehicle make ready | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 55 | 30
CECONY | Other | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – noncurrent | 201 | 148
CECONY | Deferred derivative losses - short term | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – current | 132 | 178
CECONY | Recoverable energy costs | Subsidiaries |  |
Regulatory Assets [Line Items] |  |
Regulatory assets – current | $ 31 | $ 108

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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
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