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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Assets and Liabilities Measured at Fair Value on Recurring Basis | For information on the measurement of Con Edison's investment in MVP that was measured at fair value on a non-recurring basis, see Note A. Assets and liabilities measured at fair value on a recurring basis for the years ended December 31, 2024 and 2023 are summarized below.
| 2024 | 2023
(Millions of Dollars) | Level 1 | Level 2 | Level 3 | Netting Adjustment (d) | Total | Level 1 | Level 2 | Level 3 | Netting Adjustment (d) | Total
Con Edison |  |  |  |  |  |  |  |  |  |
Derivative assets: |  |  |  |  |  |  |  |  |  |
Commodity (a)(b)(c) | $9 | $81 | $1 | $(49) | $42 | $6 | $146 | $2 | $(54) | $100
Mutual Funds (a)(b) | 570 | — | — | — | 570 | 505 | — | — | — | 505
Cash Value of Life Insurance Policies (a)(b) | — | 129 | — | — | 129 | — | 118 | — | — | 118
Total assets | $579 | $210 | $1 | $(49) | $741 | $511 | $264 | $2 | $(54) | $723
Derivative liabilities: |  |  |  |  |  |  |  |  |  |
Commodity (a)(b)(c) | $5 | $175 | $16 | $(48) | $148 | $22 | $347 | $10 | $(65) | $314
CECONY |  |  |  |  |  |  |  |  |  |
Derivative assets: |  |  |  |  |  |  |  |  |  |
Commodity (a)(b)(c) | $9 | $74 | $1 | $(48) | $36 | $6 | $143 | $1 | $(52) | $98
Mutual Funds (a)(b) | 553 | — | — | — | 553 | 488 | — | — | — | 488
Cash Value of Life Insurance Policies (a)(b) | — | 123 | — | — | 123 | — | 113 | — | — | 113
Total assets | $562 | $197 | $1 | $(48) | $712 | $494 | $256 | $1 | $(52) | $699
Derivative liabilities: |  |  |  |  |  |  |  |  |  |
Commodity (a)(b)(c) | $4 | $164 | $7 | $(47) | $128 | $20 | $326 | $6 | $(65) | $287
(a)The Companies’ policy is to review the fair value hierarchy and recognize transfers into and transfers out of the levels at the end of each reporting period. Transfers out of Level 3 represent assets and liabilities that were previously classified as Level 3 for which the inputs became observable for classification in Level 2. The inputs are now observable because of availability of observable market data due to the decrease in the terms of certain contracts from beyond three years to less than three years. (b)Level 2 assets and liabilities include investments held in the deferred compensation plan and/or non-qualified retirement plans, exchange-traded contracts where there is insufficient market liquidity to warrant inclusion in Level 1, and certain over-the-counter derivative instruments for electricity, refined products and natural gas. Derivative instruments classified as Level 2 are valued using industry standard models that incorporate corroborated observable inputs, such as pricing services or prices from similar instruments that trade in liquid markets, time value and volatility factors. (c)The accounting rules for fair value measurements and disclosures require consideration of the impact of nonperformance risk (including credit risk) from a market participant perspective in the measurement of the fair value of assets and liabilities. At December 31, 2024 and 2023, the Companies determined that nonperformance risk would have no material impact on their financial position or results of operations. (d)Amounts represent the impact of legally-enforceable master netting agreements that allow the Companies to net gain and loss positions and cash collateral held or placed with the same counterparties.
Schedule of Commodity Derivatives |
| Fair Value of Level 3 at December 31, 2024 |  |  |  | Average Market Price
| (Millions of Dollars) | Valuation Techniques | Unobservable Inputs | Range
Con Edison — Commodity
Electricity | $(16) | Discounted Cash Flow | Forward capacity prices ($/kW-month) (a) | $0.73 - $7.14 | $3.69
Transmission Congestion Contracts | 1 |  | Discounted Cash Flow | Inter-zonal forward price curves adjusted for historical zonal losses ($/MWh) (b) | $(0.20) - $3.88 | $1.85
Total Con Edison - Commodity | $(15) |  |  |  |
CECONY — Commodity
Electricity | $(7) | Discounted Cash Flow | Forward capacity prices ($/kW-month) (a) | $0.73 - $7.14 | $3.75
Transmission Congestion Contracts | 1 |  | Discounted Cash Flow | Inter-zonal forward price curves adjusted for historical zonal losses ($/MWh) (b) | $(0.20) - $3.88 | $1.85
Total CECONY — Commodity | $(6) |  |  |  |
(a)Generally, increases/(decreases) in this input in isolation would result in a higher/(lower) fair value measurement. (b)Generally, increases/(decreases) in this input in isolation would result in a lower/(higher) fair value measurement.
Reconciliation of Beginning and Ending Net Balances for Assets and Liabilities Measured at Level 3 Fair Value | The table listed below provides a reconciliation of the beginning and ending net balances for assets and liabilities measured at fair value for the years ended December 31, 2024 and 2023 and classified as Level 3 in the fair value hierarchy:
| Con Edison | CECONY
(Millions of Dollars) | 2024 | 2023 | 2024 | 2023
Beginning balance as of January 1, | $(8) | $15 | $(5) | $(6)
Included in earnings | (9) | (4) | (4) | (2)
Included in regulatory assets and liabilities | (7) | 33 | — | 31
Settlements | 10 | 4 | 4 | 2
Decrease due to the sale of the Clean Energy Businesses (a) | — | (29) | — | —
Transfer out of level 3 | (1) | (27) | (1) | (30)
Ending balance as of December 31, | $(15) | $(8) | $(6) | $(5)
(a)On March 1, 2023, Con Edison completed the sale of all of the stock of the Clean Energy Businesses. See Note W and Note X.

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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