[["( in millions )", "2017", "2016", "2015"], ["operating activities", "$ -799 ( 799 )", "$ 262", "$ 1277"], ["investing activities", "-4130 ( 4130 )", "-472 ( 472 )", "-466 ( 466 )"], ["financing activities", "10919", "-102 ( 102 )", "-515 ( 515 )"]]