in july 2007 , our board of directors authorized the purchase of up to 50 million shares of our common stock in open-market transactions or otherwise . at december 31 , 2012 , we had remaining authorization to repurchase up to 24 million shares . during the first quarter of 2012 , we repurchased and retired one million shares of our common stock , for cash aggregating $ 8 million to offset the dilutive impact of the 2012 grant of one million shares of long-term stock awards