What is the increase / (decrease) in the Total segment operating profit(1) from 2018 to 2019?
{"Total segment operating profit(1)": {"2019": 2003, "2018": 2180}, "Amortization and depreciation of acquired intangible assets and property, plant and equipment": {"2019": -924, "2018": -940}, "Restructuring and associated charges": {"2019": -502, "2018": -321}, "Gain on defined benefit plan amendment": {"2019": 168, "2018": "-"}, "Product portfolio strategy costs": {"2019": -163, "2018": -583}, "Transaction and related costs, including integration costs relating to the acquisition of Alcatel Lucent": {"2019": -48, "2018": -220}, "Impairment of assets, net of impairment reversals": {"2019": -29, "2018": -48}, "Operating model integration": {"2019": -12, "2018": "-"}, "Release of acquisition-related fair value adjustments to deferred revenue and inventory": {"2019": -6, "2018": -16}, "Divestment of businesses": {"2019": -2, "2018": -39}, "Fair value changes of legacy IPR fund": {"2019": "-", "2018": -57}, "Other": {"2019": "-", "2018": -15}, "Total operating profit/(loss)": {"2019": 485, "2018": -59}}
total_segment_operating_profit_2019 = df["Total segment operating profit(1)"]["2019"]
total_segment_operating_profit_2018 = df["Total segment operating profit(1)"]["2018"]
answer = total_segment_operating_profit_2019 - total_segment_operating_profit_2018