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Derivative Instruments and Hedging Activities (Tables)
 12 Months Ended
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Offsetting of Assets
The fair values of the Companies’ derivatives, including the offsetting of assets and liabilities, on the consolidated balance sheet at December 31, 2020 and 2019 were:
(Millions of Dollars)20202019
Balance Sheet Location
Gross
Amounts of
Recognized
Assets/
(Liabilities)
Gross
Amounts
Offset
Net Amounts of Assets/(Liabilities) (a)
Gross
Amounts of
Recognized
Assets/
(Liabilities)
Gross
Amounts
Offset
Net Amounts of Assets/(Liabilities) (a)
Con Edison
Fair value of derivative assets
Current$44$14$58(b)$60$(3)$57(b)
Noncurrent22355719(13)6(d)
Total fair value of derivative assets$66$49$115$79$(16)$63
Fair value of derivative liabilities
Current$(225)$(13)$(238)(c)$(140)$17$(123)(d)
Noncurrent (207)(33)(240)(c)(122)16(106)(d)
Total fair value of derivative liabilities$(432)$(46)$(478)$(262)$33$(229)
Net fair value derivative assets/(liabilities)$(366)$3$(363)$(183)$17$(166)
CECONY
Fair value of derivative assets
Current$20$(12)$8(b)$39$(6)$33(b)
Noncurrent16(8)817(12)5
Total fair value of derivative assets$36$(20)$16$56$(18)$38
Fair value of derivative liabilities
Current$(174)$11$(163)$(100)$19$(81)
Noncurrent(114)9(105)(80)16(64)
Total fair value of derivative liabilities$(288)$20$(268)$(180)$35$(145)
Net fair value derivative assets/(liabilities)$(252)$— $(252)$(124)$17$(107)
 
(a)Derivative instruments and collateral were offset on the consolidated balance sheet as applicable under the accounting rules. The Companies enter into master agreements for their commodity derivatives. These agreements typically provide offset in the event of contract termination. In such case, generally the non-defaulting party’s payable will be offset by the defaulting party’s payable. The non-defaulting party will customarily notify the defaulting party within a specific time period and come to an agreement on the early termination amount.
(b)At December 31, 2020 and 2019, margin deposits for Con Edison ($3 million and $9 million, respectively) and CECONY ($3 million and $8 million, respectively) were classified as derivative assets on the consolidated balance sheet, but not included in the table. Margin is collateral, typically cash, that the holder of a derivative instrument is required to deposit in order to transact on an exchange and to cover its potential losses with its broker or the exchange.
(c)Includes amounts for interest rate swaps of $(24) million in current liabilities and $(82) million in noncurrent liabilities. At December 31, 2020, the Clean Energy Businesses had interest rate swaps with notional amounts of $863 million. The expiration dates of the swaps range from 2024-2041.
(d)Includes amounts for interest rate swaps of $1 million in current assets, $(7) million in current liabilities and $(34) million in noncurrent liabilities. At December 31, 2019, the Clean Energy Businesses had interest rate swaps with notional amounts of $919 million. The expiration dates of the swaps range from 2024-2041.
Offsetting of Liabilities
The fair values of the Companies’ derivatives, including the offsetting of assets and liabilities, on the consolidated balance sheet at December 31, 2020 and 2019 were:
(Millions of Dollars)20202019
Balance Sheet Location
Gross
Amounts of
Recognized
Assets/
(Liabilities)
Gross
Amounts
Offset
Net Amounts of Assets/(Liabilities) (a)
Gross
Amounts of
Recognized
Assets/
(Liabilities)
Gross
Amounts
Offset
Net Amounts of Assets/(Liabilities) (a)
Con Edison
Fair value of derivative assets
Current$44$14$58(b)$60$(3)$57(b)
Noncurrent22355719(13)6(d)
Total fair value of derivative assets$66$49$115$79$(16)$63
Fair value of derivative liabilities
Current$(225)$(13)$(238)(c)$(140)$17$(123)(d)
Noncurrent (207)(33)(240)(c)(122)16(106)(d)
Total fair value of derivative liabilities$(432)$(46)$(478)$(262)$33$(229)
Net fair value derivative assets/(liabilities)$(366)$3$(363)$(183)$17$(166)
CECONY
Fair value of derivative assets
Current$20$(12)$8(b)$39$(6)$33(b)
Noncurrent16(8)817(12)5
Total fair value of derivative assets$36$(20)$16$56$(18)$38
Fair value of derivative liabilities
Current$(174)$11$(163)$(100)$19$(81)
Noncurrent(114)9(105)(80)16(64)
Total fair value of derivative liabilities$(288)$20$(268)$(180)$35$(145)
Net fair value derivative assets/(liabilities)$(252)$— $(252)$(124)$17$(107)
 
(a)Derivative instruments and collateral were offset on the consolidated balance sheet as applicable under the accounting rules. The Companies enter into master agreements for their commodity derivatives. These agreements typically provide offset in the event of contract termination. In such case, generally the non-defaulting party’s payable will be offset by the defaulting party’s payable. The non-defaulting party will customarily notify the defaulting party within a specific time period and come to an agreement on the early termination amount.
(b)At December 31, 2020 and 2019, margin deposits for Con Edison ($3 million and $9 million, respectively) and CECONY ($3 million and $8 million, respectively) were classified as derivative assets on the consolidated balance sheet, but not included in the table. Margin is collateral, typically cash, that the holder of a derivative instrument is required to deposit in order to transact on an exchange and to cover its potential losses with its broker or the exchange.
(c)Includes amounts for interest rate swaps of $(24) million in current liabilities and $(82) million in noncurrent liabilities. At December 31, 2020, the Clean Energy Businesses had interest rate swaps with notional amounts of $863 million. The expiration dates of the swaps range from 2024-2041.
(d)Includes amounts for interest rate swaps of $1 million in current assets, $(7) million in current liabilities and $(34) million in noncurrent liabilities. At December 31, 2019, the Clean Energy Businesses had interest rate swaps with notional amounts of $919 million. The expiration dates of the swaps range from 2024-2041.
Realized and Unrealized Gains or Losses on Commodity Derivatives The following table presents the realized and unrealized gains or losses on derivatives that have been deferred or recognized in earnings for the years ended December 31, 2020 and 2019:
              Con Edison              CECONY
(Millions of Dollars)Balance Sheet Location2020201920202019
Pre-tax gains/(losses) deferred in accordance with accounting rules for regulated operations:
CurrentDeferred derivative gains$(26)$4$(27)$5
NoncurrentDeferred derivative gains—(3)— (1)
Total deferred gains/(losses)$(26)$1$(27)$4
CurrentDeferred derivative losses$(63)$(91)$(64)$(83)
CurrentRecoverable energy costs(201)(142)(177)(124)
NoncurrentDeferred derivative losses(37)(67)(36)(65)
Total deferred gains/(losses)$(301)$(300)$(277)$(272)
Net deferred gains/(losses)$(327)$(299)$(304)$(268)
Income Statement Location
Pre-tax gain/(loss) recognized in income
Gas purchased for resale$(2)$(2)$— $— 
Non-utility revenue725— — 
Other operations and maintenance expense(3)1(3)1
Other interest expense(65)(36)— — 
Total pre-tax gain/(loss) recognized in income
$(63)$(12)$(3)$1
Hedged Volume of Derivative Transactions
The following table presents the hedged volume of Con Edison’s and CECONY’s commodity derivative transactions at December 31, 2020:
Electric Energy (MWh) (a)(b)Capacity (MW) (a)Natural Gas (Dt) (a)(b)Refined Fuels (gallons)
Con Edison 28,102,23047,258286,819,9107,728,000
CECONY26,193,80035,400267,380,0007,728,000
 
(a)Volumes are reported net of long and short positions, except natural gas collars where the volumes of long positions are reported.
(b)Excludes electric congestion and gas basis swap contracts which are associated with electric and gas contracts and hedged volumes.
Aggregate Fair Value of Companies' Derivative Instruments with Credit-Risk-Related Contingent Features
The following table presents the aggregate fair value of the Companies’ derivative instruments with credit-risk-related contingent features that are in a net liability position, the collateral posted for such positions and the additional collateral that would have been required to be posted had the lowest applicable credit rating been reduced one level and to below investment grade at December 31, 2020:
(Millions of Dollars)Con Edison (a)CECONY (a)
Aggregate fair value – net liabilities$293$277
Collateral posted212200
Additional collateral (b) (downgrade one level from current ratings)5—
Additional collateral (b)(c) (downgrade to below investment grade from current ratings)10185
 
(a)Non-derivative transactions for the purchase and sale of electricity and gas and qualifying derivative instruments, which have been designated as normal purchases or normal sales, are excluded from the table. These transactions primarily include purchases of electricity from independent system operators. In the event the Utilities and the Clean Energy Businesses were no longer extended unsecured credit for such purchases, the Companies would be required to post additional collateral of $25 million at December 31, 2020. For certain other such non-derivative transactions, the Companies could be required to post collateral under certain circumstances, including in the event counterparties had reasonable grounds for insecurity.
(b)The Companies measure the collateral requirements by taking into consideration the fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position plus amounts owed to counterparties for settled transactions and amounts required by counterparties for minimum financial security. The fair value amounts represent unrealized losses, net of any unrealized gains where the Companies have a legally enforceable right to offset.
(c)Derivative instruments that are net assets have been excluded from the table. At December 31, 2020, if Con Edison had been downgraded to below investment grade, it would have been required to post additional collateral for such derivative instruments of $51 million.