[["in millions of dollars at year end", "contractual obligations by year 2010", "contractual obligations by year 2011", "contractual obligations by year 2012", "contractual obligations by year 2013", "contractual obligations by year 2014", "contractual obligations by year thereafter"], ["long-term debt obligations ( 1 )", "$ 47162", "$ 59656", "$ 69344", "$ 28132", "$ 34895", "$ 124830"], ["lease obligations", "1247", "1110", "1007", "900", "851", "2770"], ["purchase obligations", "1032", "446", "331",