In 2005, United announced it had raised US$3 billion in financing to exit bankruptcy and filed its Plan of Reorganization, as announced, on September 7, 2005. In late 2006, Continental Airlines participated in preliminary merger discussions with United.[37][38][39] On June 4, 2008, United announced it would close its Ted unit and reconfigure the subsidiary's aircraft for a return to mainline configuration.[40][41]