[["( millions ) as of december 31", "2007", "2006", "2005"], ["net derivative gains ( losses )", "$ 24", "$ 15", "$ -11 ( 11 )"], ["net unrealized investment gains", "76", "73", "52"], ["net foreign exchange translation", "284", "118", "-119 ( 119 )"], ["postretirement plans", "-1110 ( 1110 )", "-1216 ( 1216 )", "-1077 ( 1077 )"], ["accumulated other comprehensive loss", "$ -726 ( 726 )", "$ -1010 ( 1010 )", "$ -1155 ( 1155 )"]]