What was the change in Foreign in 2019 from 2018?
{"Domestic": {"2019": 204.2, "2018": 140.3, "2017": 56.0}, "Foreign": {"2019": 11.8, "2018": 19.9, "2017": 14.2}, "Income before income taxes": {"2019": 216.0, "2018": 160.2, "2017": 70.2}}
foreign_2019 = df["Foreign"]["2019"]
foreign_2018 = df["Foreign"]["2018"]
answer = foreign_2019 - foreign_2018