. as of december 31 , 2015 , we had federal net operating loss carryforwards of $ 135 million and various state net operating loss carryforwards that expire in periods through 2035 . as of december 31 , 2015 , we also had foreign net operating loss carryforwards of $ 700 million that are related to the foreign operations of nbcuni- versal , the majority of which expire in periods through 2025