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Fair Value | 3 Months Ended
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Mar. 31, 2019
Fair Value Disclosures [Abstract] |
FAIR VALUE | FAIR VALUE The fair value of current financial assets and liabilities, debt service reserves and other deposits approximate their reported carrying amounts. The estimated fair values of the Company’s assets and liabilities have been determined using available market information. By virtue of these amounts being estimates and based on hypothetical transactions to sell assets or transfer liabilities, the use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. For further information on our valuation techniques and policies, see Note 4—Fair Value in Item 8.—Financial Statements and Supplementary Data of our 2018 Form 10-K. Recurring Measurements — The following table presents, by level within the fair value hierarchy, the Company’s financial assets and liabilities that were measured at fair value on a recurring basis as of the dates indicated (in millions). For the Company’s investments in marketable debt securities, the security classes presented are determined based on the nature and risk of the security and are consistent with how the Company manages, monitors and measures its marketable securities:
| March 31, 2019 |  | December 31, 2018
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DEBT SECURITIES: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured debentures | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | 5 |
Certificates of deposit | — |  |  | 310 |  |  | — |  |  | 310 |  |  | — |  |  | 243 |  |  | — |  |  | 243 |
Total debt securities | — |  |  | 313 |  |  | — |  |  | 313 |  |  | — |  |  | 248 |  |  | — |  |  | 248 |
EQUITY SECURITIES: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds | 21 |  |  | 49 |  |  | — |  |  | 70 |  |  | 19 |  |  | 49 |  |  | — |  |  | 68 |
Total equity securities | 21 |  |  | 49 |  |  | — |  |  | 70 |  |  | 19 |  |  | 49 |  |  | — |  |  | 68 |
DERIVATIVES: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate derivatives | — |  |  | 11 |  |  | 1 |  |  | 12 |  |  | — |  |  | 28 |  |  | 1 |  |  | 29 |
Cross-currency derivatives | — |  |  | 10 |  |  | — |  |  | 10 |  |  | — |  |  | 6 |  |  | — |  |  | 6 |
Foreign currency derivatives | — |  |  | 23 |  |  | 194 |  |  | 217 |  |  | — |  |  | 18 |  |  | 199 |  |  | 217 |
Commodity derivatives | — |  |  | 11 |  |  | 2 |  |  | 13 |  |  | — |  |  | 6 |  |  | 4 |  |  | 10 |
Total derivatives — assets | — |  |  | 55 |  |  | 197 |  |  | 252 |  |  | — |  |  | 58 |  |  | 204 |  |  | 262 |
TOTAL ASSETS | $ | 21 |  |  | $ | 417 |  |  | $ | 197 |  |  | $ | 635 |  |  | $ | 19 |  |  | $ | 355 |  |  | $ | 204 |  |  | $ | 578 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DERIVATIVES: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate derivatives | $ | — |  |  | $ | 86 |  |  | $ | 183 |  |  | $ | 269 |  |  | $ | — |  |  | $ | 67 |  |  | $ | 141 |  |  | $ | 208 |
Cross-currency derivatives | — |  |  | 3 |  |  | — |  |  | 3 |  |  | — |  |  | 5 |  |  | — |  |  | 5 |
Foreign currency derivatives | — |  |  | 28 |  |  | — |  |  | 28 |  |  | — |  |  | 41 |  |  | — |  |  | 41 |
Commodity derivatives | — |  |  | 7 |  |  | — |  |  | 7 |  |  | — |  |  | 3 |  |  | — |  |  | 3 |
Total derivatives — liabilities | — |  |  | 124 |  |  | 183 |  |  | 307 |  |  | — |  |  | 116 |  |  | 141 |  |  | 257 |
TOTAL LIABILITIES | $ | — |  |  | $ | 124 |  |  | $ | 183 |  |  | $ | 307 |  |  | $ | — |  |  | $ | 116 |  |  | $ | 141 |  |  | $ | 257 |
As of March 31, 2019, all AFS debt securities had stated maturities within one year. For the three months ended March 31, 2019 and 2018, no other-than-temporary impairments of marketable securities were recognized in earnings or Other Comprehensive Income. Gains and losses on the sale of investments are determined using the specific-identification method. The following table presents gross proceeds from the sale of AFS securities during the periods indicated (in millions):
| Three Months Ended March 31,
| 2019 |  | 2018
Gross proceeds from sale of AFS securities | $ | 148 |  |  | $ | 147 |
The following tables present a reconciliation of net derivative assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2019 and 2018 (presented net by type of derivative in millions). Transfers between Level 3 and Level 2 are determined as of the end of the reporting period and principally result from changes in the significance of unobservable inputs used to calculate the credit valuation adjustment.
Three Months Ended March 31, 2019 | Interest Rate |  | Foreign Currency |  | Commodity |  | Total
Balance at January 1 | $ | (140 | ) |  | $ | 199 |  |  | $ | 4 |  |  | $ | 63 |
Total realized and unrealized gains (losses): |  |  |  |  |  |  |
Included in earnings | — |  |  | (5 | ) |  | — |  |  | (5 | )
Included in other comprehensive income — derivative activity | (36 | ) |  | — |  |  | — |  |  | (36 | )
Included in regulatory (assets) liabilities | — |  |  | — |  |  | (2 | ) |  | (2 | )
Settlements | 2 |  |  | — |  |  | — |  |  | 2 |
Transfers of assets/(liabilities), net into Level 3 | (9 | ) |  | — |  |  | — |  |  | (9 | )
Transfers of (assets)/liabilities, net out of Level 3 | 1 |  |  | — |  |  | — |  |  | 1 |
Balance at March 31 | $ | (182 | ) |  | $ | 194 |  |  | $ | 2 |  |  | $ | 14 |
Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities held at the end of the period | $ | (2 | ) |  | $ | (5 | ) |  | $ | 2 |  |  | $ | (5 | )
Three Months Ended March 31, 2018 | Interest Rate |  | Foreign Currency |  | Commodity |  | Total
Balance at January 1 | $ | (151 | ) |  | $ | 240 |  |  | $ | 4 |  |  | $ | 93 |
Total realized and unrealized gains (losses): |  |  |  |  |  |  |
Included in earnings | 14 |  |  | (6 | ) |  | 1 |  |  | 9 |
Included in other comprehensive income — derivative activity | 27 |  |  | — |  |  | — |  |  | 27 |
Settlements | 6 |  |  | (9 | ) |  | (2 | ) |  | (5 | )
Transfers of assets/(liabilities), net into Level 3 | (8 | ) |  | — |  |  | — |  |  | (8 | )
Transfers of assets out of Level 3 | (17 | ) |  | — |  |  | — |  |  | (17 | )
Balance at March 31 | $ | (129 | ) |  | $ | 225 |  |  | $ | 3 |  |  | $ | 99 |
Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities held at the end of the period | $ | 16 |  |  | $ | (15 | ) |  | $ | 1 |  |  | $ | 2 |
The following table summarizes the significant unobservable inputs used for Level 3 derivative assets (liabilities) as of March 31, 2019 (in millions, except range amounts):
Type of Derivative |  | Fair Value |  | Unobservable Input |  | Amount or Range (Weighted Average)
Interest rate |  | $ | (182 | ) |  | Subsidiaries’ credit spreads |  | 1.78% - 4.43% (3.70%)
Foreign currency: |  |  |  |  |  |
Argentine peso |  | 194 |  |  | Argentine peso to U.S. dollar currency exchange rate after one year |  | 57 - 105 (85)
Commodity: |  |  |  |  |  |
Other |  | 2 |  |  |  |  |
Total |  | $ | 14 |  |  |  |  |
For interest rate derivatives and foreign currency derivatives, increases (decreases) in the estimates of the Company’s own credit spreads would decrease (increase) the value of the derivatives in a liability position. For foreign currency derivatives, increases (decreases) in the estimate of the above exchange rate would increase (decrease) the value of the derivative. Financial Instruments not Measured at Fair Value in the Condensed Consolidated Balance Sheets The following table presents (in millions) the carrying amount, fair value and fair value hierarchy of the Company’s financial assets and liabilities that are not measured at fair value in the Condensed Consolidated Balance Sheets as of March 31, 2019 and December 31, 2018, but for which fair value is disclosed:
|  | March 31, 2019
|  | Carrying Amount |  | Fair Value
|  | Total |  | Level 1 |  | Level 2 |  | Level 3
Assets: | Accounts receivable — noncurrent (1) | $ | 93 |  |  | $ | 192 |  |  | $ | — |  |  | $ | — |  |  | $ | 192 |
Liabilities: | Non-recourse debt | 15,815 |  |  | 16,588 |  |  | — |  |  | 13,704 |  |  | 2,884 |
| Recourse debt | 3,900 |  |  | 4,018 |  |  | — |  |  | 4,018 |  |  | — |
|  | December 31, 2018
|  | Carrying Amount |  | Fair Value
|  | Total |  | Level 1 |  | Level 2 |  | Level 3
Assets: | Accounts receivable — noncurrent (1) | $ | 100 |  |  | $ | 209 |  |  | $ | — |  |  | $ | — |  |  | $ | 209 |
Liabilities: | Non-recourse debt | 15,645 |  |  | 16,225 |  |  | — |  |  | 13,524 |  |  | 2,701 |
| Recourse debt | 3,655 |  |  | 3,621 |  |  | — |  |  | 3,621 |  |  | — |
_____________________________ (1) These amounts primarily relate to amounts due from CAMMESA, the administrator of the wholesale electricity market in Argentina, and are included in Other noncurrent assets in the accompanying Condensed Consolidated Balance Sheets. The fair value and carrying amount of these receivables exclude VAT of $17 million and $16 million as of March 31, 2019 and December 31, 2018, respectively.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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