Table:
|  |  | Year ended December 31, |  |
| --- | --- | --- | --- |
|  | 2019 | 2018 | 2017 |
| Current: |  |  |  |
| Federal | $39.5 | $35.0 | $10.4 |
| State | 9.7 | 9.4 | 5.3 |
| Foreign | 0.9 | 0.8 | 0.9 |
| Total current | 50.1 | 45.2 | 16.6 |
| Deferred: |  |  |  |
| Federal | (0.2) | (2.3) | (87.5) |
| State | (8.0) | (5.2) | 9.1 |
| Total deferred | (8.2) | (7.5) | (78.4) |
| Total income tax expense (benefit) | $41.9 | $37.7 | $(61.8) |
Paragraphs:
(19) Income Taxes
Income tax expense (benefit) consists of the following (in millions):
On December 22, 2017, the Tax Reform Act was signed into law. Among other provisions, the Tax Reform Act reduced the federal statutory corporate income tax rate from 35% to 21%. During the fourth quarter of 2017, we recorded a one-time, noncash net tax benefit of $110.9 million related to the revaluation of our deferred income tax assets and liabilities as a result of the Tax Reform Act.
Question:
When was the the Tax Reform Act signed into law? 
Answer: December 22, 2017