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:
|  | December 31, 2018 | December 31, 2017 | Change |
| --- | --- | --- | --- |
| Cash and marketable securities | $1,236 | $1,621 | $(385) |
| Cash, marketable securities and unused lines of credit as a percentage of trailing twelve months revenue | 20% | 26% | (6) pts |
| Long-term debt, net of current portion | $1,617 | $2,262 | $(645) |
| Shareholders’ equity | $3,751 | $3,460 | $291 |
| Long-term debt-to-capital including net present value of aircraft operating lease payments (a) | 47% | 53% | (6) pts |
Question:
What was the change in stockholders' equity from 2017 to 2018 for Alaska Airlines ?
Answer:
$291