Will 'Idol' survive after Cowell leaves in 2011 to launch U.S. version of 'The X Factor'? " American Idol's" star judge and Fox plan to launch a U.S. version of his wildly popular British music talent show "The X Factor" in 2011. As a result, this year will be Cowell's last with a full-time presence on the nation's most popular television series, which begins its ninth season Tuesday.