Table:
|  | 2019 |  | 2018 |  |
| --- | --- | --- | --- | --- |
|  | United States | Foreign | United States | Foreign |
|  |  | (in millions) |  |  |
| Projected benefit obligation | $55.3 | $44.0 | $50.8 | $39.1 |
| Accumulated benefit obligation | 53.2 | 39.9 | 48.6 | 35.6 |
| Fair value of plan assets | — | 1.6 | — | 1.4 |
Paragraphs:
The accumulated benefit obligation for the United States defined benefit pension plans was $198.2 million and $172.8 million at December 31, 2019 and 2018, respectively. The accumulated benefit obligation for foreign defined benefit pension plans was $39.9 million and $35.6 million at December 31, 2019 and 2018, respectively.
Information for pension plans with an accumulated benefit obligation in excess of plan assets as of December 31:
Question:
What was the change in the accumulated benefit obligation for foreign defined benefit pension plans in 2019 from 2018?