http://www.boxofficemojo.com/movies/?id=everestimax.htm
Also, even if one DOES go along with the "documentary" label, the fact remains that "Everest" has grossed more. (Boxoffice mojo's own list of "documentaries" acknowledges that Everest is one, yet in the same breath the site states that it excludes Everest from the documentaries list because it's "large format." Wha??)
But F911 will soon top "Everest." Still, keep this fact in mind when leftards crow about F911 as the "top grossing documentary": (1) it isn't a documentary; and (2) "Everest," which clearly IS a documentary, is the #1 true example of that film in worldwide box office receipts.
I know of commercial multiplexes with IMAX screens so that boat won't float.
Moore made a schlockumentary, shockumentary, mockumentary ... but certainly not a 'documentary'.