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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2019
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements Recurring Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (referred to as an "exit price"). Fair value of an asset or liability considers assumptions that market participants would use in pricing the asset or liability, including assumptions about nonperformance risk. As of December 31, 2019 and 2018, nonperformance risk was not material for Edison International and SCE. Assets and liabilities are categorized into a three-level fair value hierarchy based on valuation inputs used to determine fair value. Level 1 – The fair value of Edison International's and SCE's Level 1 assets and liabilities is determined using unadjusted quoted prices in active markets that are available at the measurement date for identical assets and liabilities. This level includes exchange-traded equity securities, U.S. treasury securities, mutual funds and money market funds. Level 2 – Edison International's and SCE's Level 2 assets and liabilities include fixed income securities, primarily consisting of U.S. government and agency bonds, municipal bonds and corporate bonds, and over-the-counter derivatives. The fair value of fixed income securities is determined using a market approach by obtaining quoted prices for similar assets and liabilities in active markets and inputs that are observable, either directly or indirectly, for substantially the full term of the instrument. The fair value of SCE's over-the-counter derivative contracts is determined using an income approach. SCE uses standard pricing models to determine the net present value of estimated future cash flows. Inputs to the pricing models include forward published or posted clearing prices from an exchange (Intercontinental Exchange) for similar instruments and discount rates. A primary price source that best represents trade activity for each market is used to develop observable forward market prices in determining the fair value of these positions. Broker quotes, prices from exchanges or comparison to executed trades are used to validate and corroborate the primary price source. These price quotations reflect mid-market prices (average of bid and ask) and are obtained from sources believed to provide the most liquid market for the commodity. Level 3 – The fair value of SCE's Level 3 assets and liabilities is determined using the income approach through various models and techniques that require significant unobservable inputs. This level includes derivative contracts that trade infrequently such as congestion revenue rights ("CRRs"). Edison International Parent and Other does not have any Level 3 assets and liabilities. Assumptions are made in order to value derivative contracts in which observable inputs are not available. In circumstances where fair value cannot be verified with observable market transactions, it is possible that a different valuation model could produce a materially different estimate of fair value. Modeling methodologies, inputs, and techniques are reviewed and assessed as markets continue to develop and more pricing information becomes available and the fair value is adjusted when it is concluded that a change in inputs or techniques would result in a new valuation that better reflects the fair value of those derivative contracts. See Note 6 for a discussion of derivative instruments. SCE The following table sets forth assets and liabilities of SCE that were accounted for at fair value by level within the fair value hierarchy:
| December 31, 2019
(in millions) | Level 1 |  | Level 2 |  | Level 3 |  | Netting and Collateral 1 |  | Total
Assets at fair value |  |  |  |  |  |  |  |  |
Derivative contracts | $ | — |  |  | $ | 19 |  |  | $ | 83 |  |  | $ | (15 | ) |  | $ | 87 |
Other | 4 |  |  | 14 |  |  | — |  |  | — |  |  | 18 |
Nuclear decommissioning trusts: |  |  |  |  |  |  |  |  |
Stocks 2 | 1,765 |  |  | — |  |  | — |  |  | — |  |  | 1,765 |
Fixed Income 3 | 738 |  |  | 2,024 |  |  | — |  |  | — |  |  | 2,762 |
Short-term investments, primarily cash equivalents | 98 |  |  | 48 |  |  | — |  |  | — |  |  | 146 |
Subtotal of nuclear decommissioning trusts 4 | 2,601 |  |  | 2,072 |  |  | — |  |  | — |  |  | 4,673 |
Total assets | 2,605 |  |  | 2,105 |  |  | 83 |  |  | (15 | ) |  | 4,778 |
Liabilities at fair value |  |  |  |  |  |  |  |  |
Derivative contracts | — |  |  | 11 |  |  | 5 |  |  | (15 | ) |  | 1 |
Total liabilities | — |  |  | 11 |  |  | 5 |  |  | (15 | ) |  | 1 |
Net assets | $ | 2,605 |  |  | $ | 2,094 |  |  | $ | 78 |  |  | $ | — |  |  | $ | 4,777 |
| December 31, 2018
(in millions) | Level 1 |  | Level 2 |  | Level 3 |  | Netting and Collateral 1 |  | Total
Assets at fair value |  |  |  |  |  |  |  |  |  |
Derivative contracts | $ | — |  |  | $ | 32 |  |  | $ | 141 |  |  | $ | — |  |  | $ | 173 |
Other | 9 |  |  | 21 |  |  | — |  |  | — |  |  | 30 |
Nuclear decommissioning trusts: |  |  |  |  |  |  |  |  |
Stocks 2 | 1,382 |  |  | — |  |  | — |  |  | — |  |  | 1,382 |
Fixed Income 3 | 1,001 |  |  | 1,665 |  |  | — |  |  | — |  |  | 2,666 |
Short-term investments, primarily cash equivalents | 120 |  |  | 95 |  |  | — |  |  | — |  |  | 215 |
Subtotal of nuclear decommissioning trusts 4 | 2,503 |  |  | 1,760 |  |  | — |  |  | — |  |  | 4,263 |
Total assets | 2,512 |  |  | 1,813 |  |  | 141 |  |  | — |  |  | 4,466 |
Liabilities at fair value |  |  |  |  |  |  |  |  |
Derivative contracts | — |  |  | 13 |  |  | — |  |  | (7 | ) |  | 6 |
Total liabilities | — |  |  | 13 |  |  | — |  |  | (7 | ) |  | 6 |
Net assets | $ | 2,512 |  |  | $ | 1,800 |  |  | $ | 141 |  |  | $ | 7 |  |  | $ | 4,460 |
1 | Represents the netting of assets and liabilities under master netting agreements and cash collateral.
2 | Approximately 72% and 71% of SCE's equity investments were located in the United States at December 31, 2019 and 2018, respectively.
3 | Includes corporate bonds, which were diversified and included collateralized mortgage obligations and other asset backed securities of $46 million and $67 million at December 31, 2019 and 2018, respectively.
4 | Excludes net payables of $111 million and $143 million at December 31, 2019 and 2018, respectively, which consist of interest and dividend receivables as well as receivables and payables related to SCE's pending securities sales and purchases.
Edison International Parent and Other Edison International Parent and Other assets measured at fair value consisted of money market funds of $31 million and $115 million at December 31, 2019 and 2018, respectively, classified as Level 1. SCE Fair Value of Level 3 The following table sets forth a summary of changes in SCE's fair value of Level 3 net derivative assets and liabilities:
|  | December 31,
(in millions) |  | 2019 |  | 2018
Fair value of net assets at beginning of period |  | $ | 141 |  |  | $ | 101 |
Total realized/unrealized (losses) gains: |  |  |  |
Included in regulatory assets and liabilities 1 |  | (63 | ) |  | 40 |
Fair value of net assets at end of period 2 |  | 78 |  |  | 141 |
Change during the period in unrealized gains and losses related to assets and liabilities held at the end of the period |  | $ | 62 |  |  | $ | 138 |
1 | Due to regulatory mechanisms, SCE's realized and unrealized gains and losses are recorded as regulatory assets and liabilities.
2 | There were no material transfers into or out of Level 3 during 2019 and 2018.
The following table sets forth SCE's valuation techniques and significant unobservable inputs used to determine fair value for significant Level 3 assets and liabilities:
| Fair Value (in millions) |  | Significant | Range | Weighted Average
| Assets |  | Liabilities | Valuation Technique | Unobservable Input
Congestion revenue rights |  |  |  |
December 31, 2019 | $ | 83 |  |  | $ | 5 |  | Auction prices | CAISO CRR auction clearing prices | $(3.59) - $25.32 | $1.97
December 31, 2018 | 141 |  |  | — |  | Auction prices | CAISO CRR auction clearing prices | $(7.41) - $41.52 | $1.62
Level 3 Fair Value Uncertainty For CRRs, increases or decreases in CAISO auction price would result in higher or lower fair value, respectively. Nuclear Decommissioning Trusts SCE's nuclear decommissioning trust investments include equity securities, U.S. treasury securities and other fixed income securities. Equity and treasury securities are classified as Level 1 as fair value is determined by observable market prices in active or highly liquid and transparent markets. The remaining fixed income securities are classified as Level 2. The fair value of these financial instruments is based on evaluated prices that reflect significant observable market information such as reported trades, actual trade information of similar securities, benchmark yields, broker/dealer quotes, issuer spreads, bids, offers and relevant credit information. There are no securities classified as Level 3 in the nuclear decommissioning trusts. SCE's investment policies and CPUC requirements place limitations on the types and investment grade ratings of the securities that may be held by the nuclear decommissioning trust funds. These policies restrict the trust funds from holding alternative investments and limit the trust funds' exposures to investments in highly illiquid markets. With respect to equity and fixed income securities, the trustee obtains prices from third-party pricing services which SCE is able to independently corroborate as described below. The trustee monitors prices supplied by pricing services, including reviewing prices against defined parameters' tolerances and performs research and resolves variances beyond the set parameters. SCE corroborates the fair values of securities by comparison to other market-based price sources obtained by SCE's investment managers. Differences outside established thresholds are followed-up with the trustee and resolved. For each reporting period, SCE reviews the trustee determined fair value hierarchy and overrides the trustee level classification when appropriate. Nonrecurring Fair Value Measurements Edison International assesses goodwill at the reporting unit level. The fair value of the Edison Energy reporting unit is classified as Level 3 and is estimated using the income approach. During the fourth quarter of 2019 and 2018, Edison International evaluated the recoverability of goodwill and recorded impairment charges of Edison Energy's goodwill totaling $25 million ($18 million after-tax) and $19 million ($13 million after-tax), respectively. See Note 1 for further details. Fair Value of Debt Recorded at Carrying Value The carrying value and fair value of Edison International's and SCE's long-term debt (including current portion of long-term debt) are as follows:
| December 31, 2019 |  | December 31, 2018
(in millions) | Carrying Value 1 |  | Fair Value 2 |  | Carrying Value 1 |  | Fair Value 2
Edison International | $ | 18,343 |  |  | $ | 20,137 |  |  | $ | 14,711 |  |  | $ | 14,844 |
SCE | 15,211 |  |  | 16,892 |  |  | 12,971 |  |  | 13,180 |
1 | Carrying value is net of debt issuance costs.
2 The fair value of Edison International's and SCE's long-term debt is classified as Level 2.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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