As of December 31, 2012, we had U.S. federal NOLs of approximately $7.5 billion, of which approximately $6.0 billion was allocated to the portion of 2012 after the ownership change described below, that, if unused, will begin to expire in 2031. As of December 31, 2020, we had U.S. federal NOLs of approximately $2.6 billion, of which $2.5 billion were not subject to limitation under Section 382 of the United States Internal Revenue Code of 1986, as amended (the “Code”).