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Financial Assets and Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
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Summary of Categorization of the Financial Instruments, Excluding Cash and Cash Equivalents | Set out below is the categorization of the financial instruments, excluding cash and cash equivalents, held by the Company as of December 31, 2017 and 2018:
|  | December 31, 2017 |
|  | Loans and Receivables |  |  | Fair value through profit or loss |  |  | Fair value through OCI |
Financial Assets: |  |  |  |  |  |  |  |  |  |  |  |
Equity investments at fair value through OCI and other short term investments |  | Ps. | 12,438,019 |  |  | Ps. | — |  |  | Ps. | 46,682,657 |
Accounts receivable from subscribers, distributors, contractual assets and other |  |  | 163,085,537 |  |  |  | — |  |  |  | — |
Related parties |  |  | 868,230 |  |  |  | — |  |  |  | — |
Derivative financial instruments |  |  | — |  |  |  | 8,037,384 |  |  |  | — |
Total |  | Ps. | 176,391,786 |  |  | Ps. | 8,037,384 |  |  | Ps. | 46,682,657 |
Financial Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | Ps. | 697,884,899 |  |  | Ps. | — |  |  | Ps. | — |
Accounts payable |  |  | 212,673,407 |  |  |  | — |  |  |  | — |
Related parties |  |  | 2,540,412 |  |  |  | — |  |  |  | — |
Derivative financial instruments |  |  | — |  |  |  | 14,359,460 |  |  |  | — |
Total |  | Ps. | 913,098,718 |  |  | Ps. | 14,359,460 |  |  | Ps. | — |
Summary of Fair Value for the Financial Assets (Excluding Cash and Cash Equivalents) and Financial Liabilities | The fair value for the financial assets (excluding cash and cash equivalents) and financial liabilities shown in the consolidated statements of financial position at December 31, 2017 and 2018 is as follows:
|  | Measurement of fair value at December 31, 2017 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments at fair value through OCI and other short-term investments |  | Ps. | 46,682,657 |  |  | Ps. | 12,438,019 |  |  | Ps. | — |  |  | Ps. | 59,120,676 |
Derivative financial instruments |  |  | — |  |  |  | 8,037,384 |  |  |  | — |  |  |  | 8,037,384 |
Pension plan assets |  |  | 218,518,358 |  |  |  | 9,039,270 |  |  |  | 130,976 |  |  |  | 227,688,604 |
Total |  | Ps. | 265,201,015 |  |  | Ps. | 29,514,673 |  |  | Ps. | 130,976 |  |  | Ps. | 294,846,664 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | Ps. | 691,769,785 |  |  | Ps. | 63,147,153 |  |  | Ps. | — |  |  | Ps. | 754,916,938 |
Derivative financial instruments |  |  | — |  |  |  | 14,359,460 |  |  |  | — |  |  |  | 14,359,460 |
Total |  | Ps. | 691,769,785 |  |  | Ps. | 77,506,613 |  |  | Ps. | — |  |  | Ps. | 769,276,398 |
|  | Measurement of fair value at December 31, 2018 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments at fair value through OCI and other short-term investments |  | Ps. | 39,028,083 |  |  | Ps. | 9,987,851 |  |  | Ps. | — |  |  | Ps. | 49,015,934 |
Derivative financial instruments |  |  | — |  |  |  | 5,287,548 |  |  |  | — |  |  |  | 5,287,548 |
Pension plan assets |  |  | 186,557,731 |  |  |  | 17,096,344 |  |  |  | 17,047 |  |  |  | 203,671,122 |
Total |  | Ps. | 225,585,814 |  |  | Ps. | 32,371,743 |  |  | Ps. | 17,047 |  |  | Ps. | 257,974,604 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | Ps. | 594,713,342 |  |  | Ps. | 99,723,251 |  |  | Ps. | — |  |  | Ps. | 694,436,593 |
Derivative financial instruments |  |  |  |  |  |  | 17,107,579 |  |  |  | — |  |  |  | 17,107,579 |
Total |  | Ps. | 594,713,342 |  |  | Ps. | 116,830,830 |  |  | Ps. | — |  |  | Ps. | 711,544,172 |
Summary of Changes in Liabilities Arising From Financing Activities | Changes in liabilities arising from financing activities
|  | At January 1, 2017 |  |  | Cash flow |  |  | Foreign currency exchange and other |  |  | At December 31, 2017 |
Total liabilities from financing activities |  | Ps. | 707,801,403 |  |  | Ps. | (27,433,489 | ) |  | Ps. | 17,516,985 |  |  | Ps. | 697,884,899 |
|  | At January 1, 2018 |  |  | Cash flow |  |  | Foreign currency exchange and other |  |  | At December 31, 2018 |
Total liabilities from financing activities |  | Ps. | 697,884,899 |  |  | Ps. | (34,050,923 | ) |  | Ps. | (24,911,523 | ) |  | Ps. | 638,922,453 |

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