. at december 31 , 2009 , total future minimum commitments under existing non-cancelable operat- ing leases and purchase obligations were as follows : in millions 2010 2011 2012 2013 2014 thereafter obligations $ 177 $ 148 $ 124 $ 96 $ 79 $ 184 purchase obligations ( a ) 2262 657 623 556 532 3729 .