What is the change in the value of the company's total assets between 2018 and 2019?
{"Assets -- Entertainment and Communications": {"2019": 1840.0, "2018": 1898.8}, "Assets -- IT Services and Hardware": {"2019": 500.7, "2018": 468.1}, "Assets -- Corporate and eliminations": {"2019": 313.1, "2018": 363.3}, "Assets -- Total assets": {"2019": 2653.8, "2018": 2730.2}}
total_assets_2019 = df["Assets -- Total assets"]["2019"]
total_assets_2018 = df["Assets -- Total assets"]["2018"]
answer = total_assets_2019 - total_assets_2018