What was the change in Gains excluded from the hedging relationship in 2019 from 2018?
{"": {"2019": "", "2018": "(in millions)", "2017": ""}, "Gains (losses) recorded in other comprehensive income (loss)": {"2019": 53, "2018": -25, "2017": -20}, "Gains (losses) excluded from the hedging relationship (1)": {"2019": 66, "2018": 21, "2017": -58}}
gains_2019 = df["Gains (losses) excluded from the hedging relationship (1)"]["2019"]
gains_2018 = df["Gains (losses) excluded from the hedging relationship (1)"]["2018"]
answer = gains_2019 - gains_2018