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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2016
Fair Value Disclosures [Abstract] |
Fair Value of Assets and Liabilities Measured on Recurring Basis | Our assets and liabilities that are measured at fair value on a recurring basis include the following (in millions):
|  |  |  |  | Fair Value Measurements at December 31, 2016 Using |
|  | Total |  |  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 35 |  |  | $ | 35 |  |  | $ | — |  |  | $ | — |
Available-for-sale securities |  |  | 46 |  |  |  | — |  |  |  | 46 |  |  |  | — |
Fixed-income securities |  |  | 39 |  |  |  | — |  |  |  | 39 |  |  |  | — |
Redeemable preferred stock |  |  | 54 |  |  |  | — |  |  |  | — |  |  |  | 54 |
Total assets |  | $ | 174 |  |  | $ | 35 |  |  | $ | 85 |  |  | $ | 54 |
|  |  |  |  | Fair Value Measurements at December 31, 2015 Using |
|  | Total |  |  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 35 |  |  | $ | 35 |  |  | $ | — |  |  | $ | — |
Available-for-sale securities |  |  | 43 |  |  |  | — |  |  |  | 43 |  |  |  | — |
Fixed-income securities |  |  | 40 |  |  |  | — |  |  |  | 40 |  |  |  | — |
Foreign currency derivatives |  |  | 78 |  |  |  | — |  |  |  | 78 |  |  |  | — |
Redeemable preferred stock |  |  | 47 |  |  |  | — |  |  |  | — |  |  |  | 47 |
Total assets |  | $ | 243 |  |  | $ | 35 |  |  | $ | 161 |  |  | $ | 47 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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