[["( millions of dollars )", "2018", "2017", "2016"], ["losses on debt extinguishment ( a )", "$ -16 ( 16 )", "$ -73 ( 73 )", "$ 2014"], ["vyaire medical-related amounts ( b )", "288", "-3 ( 3 )", "2014"], ["other equity investment income", "8", "3", "8"], ["losses on undesignated foreign exchange derivatives net", "-14 ( 14 )", "-11 ( 11 )", "-3 ( 3 )"], ["royalty income ( c )", "51", "2014", "2014"], ["gains on previously held investments ( d )", "2014", "24", "2014"], ["other", "2014", "3", "7"], ["other