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Financial Income and Other Items, Net (Tables) | 12 Months Ended
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Dec. 31, 2018
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Summary of Financial Income and Other Items | The detail of financial income and other items, net in 2018, 2017 and 2016 was as follows:
|  |  |  |  | 2018 |  |  | 2017 |  |  | 2016 |
Results in the sale of associates and remeasurement of previously held interest before change in control of associates (notes 4.1 and 13.1) |  |  | Ps |  |  |  | (204 | ) |  |  | 4,164 |  |  |  | — |
Financial income |  |  |  |  |  |  | 355 |  |  |  | 338 |  |  |  | 402 |
Results from financial instruments, net (notes 13.2 and 16.4) |  |  |  |  |  |  | 692 |  |  |  | 161 |  |  |  | 113 |
Foreign exchange results |  |  |  |  |  |  | 341 |  |  |  | (26 | ) |  |  | 4,982 |
Effects of amortized cost on assets and liabilities and others, net |  |  |  |  |  |  | (1,088 | ) |  |  | (1,021 | ) |  |  | (1,030 | )
|  |  | Ps |  |  |  | 96 |  |  |  | 3,616 |  |  |  | 4,467 |

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