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Fair Value Measurements | 6 Months Ended
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Jun. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements. U.S. GAAP requires enhanced disclosures about investments and non-recurring non-financial assets and liabilities that are measured and reported at fair value and has established a hierarchal disclosure framework that prioritizes and ranks the level of market price observability used in measuring investments or non-financial assets and liabilities at fair value. Market price observability is impacted by a number of factors, including the type of investment and the characteristics specific to the investment. Investments with readily available active quoted prices or for which fair value can be measured from actively quoted prices generally will have a higher degree of market price observability and a lesser degree of judgment used in measuring fair value. Investments and non-financial assets and/or liabilities measured and reported at fair value are classified and disclosed in one of the following categories: Level 1 - Quoted prices are available in active markets for identical investments and non-financial assets and/or liabilities as of the reporting date. Level 2 - Pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the reporting date, and fair value is determined through the use of models or other valuation methodologies where all significant inputs are observable. The inputs and assumptions of our Level 2 investments are derived from market observable sources including reported trades, broker/dealer quotes and other pertinent data. Level 3 - Pricing inputs are unobservable for the investment and non-financial asset and/or liability and include situations where there is little, if any, market activity for the investment or non-financial asset and/or liability. The inputs into the determination of fair value require significant management judgment or estimation. Fair value is determined using comparable market transactions and other valuation methodologies, adjusted as appropriate for liquidity, credit, market and/or other risk factors. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the investments', non-financial assets' and/or liabilities' level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and consideration of factors specific to the investment. Significant transfers, if any, between the levels within the fair value hierarchy are recognized at the beginning of the reporting period when changes in circumstances require such transfers. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table summarizes the valuation of our assets and liabilities by the above fair value hierarchy levels measured on a recurring basis:
| June 30, 2018 |  | December 31, 2017
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets | (in millions)
Investments (Note 4) | $ | 7,972 |  |  | $ | 275 |  |  | $ | 333 |  |  | $ | 8,580 |  |  | $ | 9,378 |  |  | $ | 264 |  |  | $ | 278 |  |  | $ | 9,920 |
Derivative contracts, at fair value (Note 6)(1) | 10 |  |  | 17 |  |  | — |  |  | 27 |  |  | — |  |  | — |  |  | — |  |  | — |
| $ | 7,982 |  |  | $ | 292 |  |  | $ | 333 |  |  | $ | 8,607 |  |  | $ | 9,378 |  |  | $ | 264 |  |  | $ | 278 |  |  | $ | 9,920 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities sold, not yet purchased (Note 4) | $ | 368 |  |  | $ | — |  |  | $ | — |  |  | $ | 368 |  |  | $ | 988 |  |  | $ | 35 |  |  | $ | — |  |  | $ | 1,023 |
Other liabilities | — |  |  | 11 |  |  | — |  |  | 11 |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
Derivative contracts, at fair value (Note 6) | — |  |  | 460 |  |  | — |  |  | 460 |  |  | 36 |  |  | 1,239 |  |  | — |  |  | 1,275 |
| $ | 368 |  |  | $ | 471 |  |  | $ | — |  |  | $ | 839 |  |  | $ | 1,024 |  |  | $ | 1,275 |  |  | $ | — |  |  | $ | 2,299 |
(1) | Amounts are classified within other assets in our condensed consolidated balance sheets.
Assets Measured at Fair Value on a Recurring Basis for Which We Use Level 3 Inputs to Determine Fair Value The changes in investments measured at fair value on a recurring basis for which we use Level 3 inputs to determine fair value are as follows:
| Six Months Ended June 30,
| 2018 |  | 2017
| (in millions)
Balance at January 1 | $ | 278 |  |  | $ | 207 |
Net unrealized gains | 55 |  |  | 17 |
Balance at June 30 | $ | 333 |  |  | $ | 224 |
Net unrealized gains during the six months ended June 30, 2018 and 2017 relate to a certain equity investment which is considered a Level 3 investment due to unobservable market data and is measured at fair value on a recurring basis. We determined the fair value of this investment based on recent market transactions. As of June 30, 2018 and December 31, 2017, the fair value of this investment was $329 million and $274 million, respectively. Assets Measured at Fair Value on a Non-Recurring Basis for Which We Use Level 3 Inputs to Determine Fair Value Certain assets measured at fair value using Level 3 inputs on a non-recurring basis have been impaired. During the three and six months ended June 30, 2018, we recorded impairment charges of $7 million relating to property, plant and equipment, and during the six months ended June 30, 2017, we recorded impairment charges of $2 million relating to property, plant and equipment. We determined the fair value of property, plant and equipment by applying probability weighted, expected present value techniques to the estimated future cash flows using assumptions a market participant would utilize. In addition, during the three and six months ended June 30, 2017, we recorded a loss of $2 million and $7 million, respectively, from marking inventory down to net realizable value at our Automotive segment. Additionally, in connection with our reclassification of certain railcars leased to others from held and used to assets held for sale, we recorded an impairment charge at our Railcar segment of $67 million for each of the three and six months ended June 30, 2017. Refer to Note 11, "Segment Reporting," for total impairment recorded by each of our segments.

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