Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
|  |  | Fair Value Measurements as of December 31, 2018 | Fair Value Measurements as of December 31, 2018 | Fair Value Measurements as of December 31, 2018 | Fair Value Measurements as of December 31, 2018 |
| --- | --- | --- | --- | --- | --- |
|  |  | Quoted Prices in Active Markets  for Identical Assets (Level 1) | Significant Observable Inputs (Level 2) | Significant Unobservable Inputs (Level 3) | Total |
| Cash and cash equivalents |  | $23 | $— | $— | $23 |
| Equity securities: | International markets (a) (b) | 3,181 | — | — | 3,181 |
| Equity securities: | Large-cap companies (b) | 2,021 | — | — | 2,021 |
| Equity securities: | Mid-cap companies (b) | 583 | — | — | 583 |
| Equity securities: | Small-cap companies (b) | 122 | — | — | 122 |
| Fixed income: | Corporate debt (c) | — | 2,116 | — | 2,116 |
| Fixed income: | Government securities (d) | — | 228 | — | 228 |
| Fixed income: | U.S. municipal securities | — | 40 | — | 40 |
| Alternative instruments: | Private market partnerships (e) | — | — | 7 | 7 |
| Alternative instruments: | Private market partnerships measured at net asset value (e) (g) | — | — | — | 1,188 |
| Alternative instruments: | Common/collective trusts (f) | — | 218 | — | 218 |
| Alternative instruments: | Common/collective trusts and 103-12 Investment Trust measured at net asset value (f) (g) | — | — | — | 227 |
| Alternative instruments: | Insurance group annuity contracts | — | — | 2 | 2 |
| Alternative instruments: | Dividend and interest receivable | 47 | — | — | 47 |
| Alternative instruments: | Due to/from brokers for sale of securities – net | 5 | — | — | 5 |
| Alternative instruments: | Other liabilities – net | (7) | — | — | (7) |
| Alternative instruments: | Total | $5,975 | $2,602 | $9 | $10,001 |
Question:
How much fixed income corporate debt did American Airlines have in 2018 for significant observable inputs?
Answer:
2,116