What was the increase / (decrease) in the Total consolidated research, development and engineering from 2018 to 2019?
{"($ in million) -- For the year ended December 31:": {"2019": 2019, "2018": 2018, "Yr.-to-Yr. Percent Change": "Yr.-to-Yr. Percent Change"}, "($ in million) -- Total consolidated research, development and engineering": {"2019": 5989.0, "2018": 5379.0, "Yr.-to-Yr. Percent Change": 11.3}, "Non-operating adjustment -- Acquisition-related charges": {"2019": -53, "2018": "-", "Yr.-to-Yr. Percent Change": "NM"}, "Non-operating adjustment -- Operating (non-GAAP) research, development and engineering": {"2019": 5936.0, "2018": 5379.0, "Yr.-to-Yr. Percent Change": 10.4}}
total_consolidated_research_development_and_engineering_2019 = df["($ in million) -- Total consolidated research, development and engineering"]["2019"]
total_consolidated_research_development_and_engineering_2018 = df["($ in million) -- Total consolidated research, development and engineering"]["2018"]
answer = total_consolidated_research_development_and_engineering_2019 - total_consolidated_research_development_and_engineering_2018