Table:
|  |  | Year Ended |  |
| --- | --- | --- | --- |
|  | April 26, 2019 | April 27, 2018 | April 28, 2017 |
| Balance at beginning of period | $ 348 | $ 218 | $ 216 |
| Additions based on tax positions related to the current year | 11 | 131 | 7 |
| Additions for tax positions of prior years | 26 | — | 7 |
| Decreases for tax positions of prior years | (35 ) | (1 ) | — |
| Settlements | (54 ) | — | (12 ) |
| Balance at end of period | $ 296 | $ 348 | $ 218 |
Paragraphs:
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):
As of April 26, 2019, we had $296 million of gross unrecognized tax benefits, of which $252 million has been recorded in other long-term liabilities. Unrecognized tax benefits of $246 million, including penalties, interest and indirect benefits, would affect our provision for income taxes if recognized. As a result of U.S. tax reform, we recorded provisional gross unrecognized tax benefits of $114 million during fiscal 2018.
We recognized a benefit for adjustments to accrued interest and penalties related to unrecognized tax benefits in the income tax provision of approximately $4 million in fiscal 2019 and expense of $5 million in each of fiscal 2018 and 2017. Accrued interest and penalties of $18 million and $22 million were recorded in the consolidated balance sheets as of April 26, 2019 and April 27, 2018, respectively.
Question:
What was the change in the Balance at beginning of period between 2017 and 2018?
Answer: 218-216 = 2