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Derivative Instruments
 6 Months Ended
Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative Instruments Derivative Instruments
Derivative financial instruments are used to manage exposure to commodity price risk. These risks are managed in part by entering into forward commodity transactions, including options, swaps and futures. To mitigate credit risk from counterparties in the event of nonperformance, master netting agreements are used whenever possible and counterparties may be required to pledge collateral depending on the creditworthiness of each counterparty and the risk associated with the transaction.
Commodity Price Risk
Commodity price risk represents the potential impact that can be caused by a change in the market value of a particular commodity. SCE's electricity price exposure arises from energy purchased from and sold to wholesale markets as a result of differences between SCE's load requirements and the amount of energy delivered from its generating facilities and PPAs. SCE's natural gas price exposure arises from natural gas purchased for the Mountainview power plant and peaker plants, QF contracts where pricing is based on a monthly natural gas index and PPAs in which SCE has agreed to provide the natural gas needed for generation, referred to as tolling arrangements.
Credit and Default Risk
Credit and default risk represent the potential impact that can be caused if a counterparty were to default on its contractual obligations and SCE would be exposed to spot markets for buying replacement power or selling excess power. In addition, SCE would be exposed to the risk of non-payment of accounts receivable, primarily related to the sales of excess power and realized gains on derivative instruments.
Certain power and gas contracts contain master netting agreements or similar agreements, which generally allow counterparties subject to the agreement to offset amounts when certain criteria are met, such as in the event of default. The objective of netting is to reduce credit exposure. Additionally, to reduce SCE's risk exposures counterparties may be required to pledge collateral depending on the creditworthiness of each counterparty and the risk associated with the transaction.
Certain power and gas contracts contain a provision that requires SCE to maintain an investment grade rating from each of the major credit rating agencies, referred to as a credit-risk-related contingent feature. If SCE's credit rating were to fall below investment grade, SCE may be required to post additional collateral to cover derivative liabilities and the related outstanding payables. The net fair value of all derivative liabilities with these credit-risk-related contingent features was $32 million and $1 million as of June 30, 2020 and December 31, 2019, respectively, for which SCE posted no collateral to its counterparties for its derivative liabilities and related outstanding payables at both June 30, 2020 and December 31, 2019. If the credit-risk-related contingent features underlying these agreements were triggered on June 30, 2020, SCE would be required to post $32 million of collateral, of which of $1 million is related to outstanding payables.
Fair Value of Derivative Instruments
SCE presents its derivative assets and liabilities on a net basis on its consolidated balance sheets when subject to master netting agreements or similar agreements. Derivative positions are also offset against margin and cash collateral deposits. In addition, SCE has provided collateral in the form of letters of credit. Collateral requirements can vary depending upon the level of unsecured credit extended by counterparties, changes in market prices relative to contractual commitments and other factors. See Note 4 for a discussion of fair value of derivative instruments. The following table summarizes the gross and net fair values of SCE's commodity derivative instruments:
June 30, 2020
 Derivative AssetsDerivative LiabilitiesNet
Assets
(in millions)
Short-Term1
Long-Term2
Subtotal
Short-Term3
Long-TermSubtotal
Commodity derivative contracts
       
Gross amounts recognized$39  $1  $40  $67  $—  $67  $(27) 
Gross amounts offset in the consolidated balance sheets
(6) —  (6) (6) —  (6) —  
Cash collateral posted4
—  —  —  (28) —  (28) 28  
Net amounts presented in the consolidated balance sheets
$33  $1  $34  $33  $—  $33  $1  
December 31, 2019
 Derivative AssetsDerivative LiabilitiesNet
Assets
(in millions)
Short-Term1
Long-Term2
Subtotal
Short-Term3
Long-TermSubtotal
Commodity derivative contracts
Gross amounts recognized$94  $8  $102  $14  $2  $16  $86  
Gross amounts offset in the consolidated balance sheets
(13) (2) (15) (13) (2) (15) —  
Cash collateral posted4
—  —  —  —  —  —  —  
Net amounts presented in the consolidated balance sheets
$81  $6  $87  $1  $—  $1  $86  
1  Included in "Other current assets" on Edison International's and SCE's consolidated balance sheets.
2 Included in "Other long-term assets" on Edison International's and SCE's consolidated balance sheets.
3 Included in "Other current liabilities" on Edison International's and SCE's consolidated balance sheets.
4  At June 30, 2020, SCE posted $43 million of cash, of which $28 million was offset against net derivative liabilities and $15 million was reflected in "Other current assets" on the consolidated balance sheets. At December 31, 2019, SCE posted $24 million of cash, which was not offset against net derivative liabilities and was reflected in "Other current assets" on the consolidated balance sheets.
Income Statement Impact of Derivative Instruments
SCE recognizes realized gains and losses on derivative instruments as purchased power expense and expects that such gains or losses will be part of the purchased power costs recovered from customers. As a result, realized gains and losses do not affect earnings, but may temporarily affect cash flows. Due to expected future recovery from customers, unrealized gains and losses are recorded as regulatory assets and liabilities and therefore also do not affect earnings. The remaining effects of derivative activities and related regulatory offsets are reported in cash flows from operating activities in the consolidated statements of cash flows.
The following table summarizes the components of SCE's economic hedging activity:
 Three months ended June 30,Six months ended June 30,
(in millions)2020201920202019
Realized (losses) gains$(16) $(2) $(60) $30  
Unrealized losses(31) (78) (114) (128) 
Notional Volumes of Derivative Instruments
The following table summarizes the notional volumes of derivatives used for SCE's economic hedging activities:
 Economic Hedges
CommodityUnit of MeasureJune 30, 2020December 31, 2019
Electricity options, swaps and forwardsGWh4,863  3,155  
Natural gas options, swaps and forwardsBcf50  43  
Congestion revenue rightsGWh31,945  48,170