[["for the years ended december 31,", "2015", "2014", "2013"], ["total expense pre-tax", "$ 46.4", "$ 49.4", "$ 48.5"], ["tax benefit related to awards", "-14.5 ( 14.5 )", "-15.5 ( 15.5 )", "-15.6 ( 15.6 )"], ["total expense net of tax", "$ 31.9", "$ 33.9", "$ 32.9"]]