everything taken with a camera or put onto photo paper is a document or documentation.
if it is a commercial image, it is a document of something concocted, meant to show and sell ...
if it is habs/haer or a portrait, it is a document of something's likeness ...
if it is a landscape it is a document of where ever someone was ...
if it is a photogram or some wacky darkroom "stuff" it is a document of whatever was done, "physical evidence" ...
and photojournalism too ...

all photography is documentary and/or fine art, even snapshots.
i have heard of gallery exhibits of film that was found in thrift store cameras, and then processed ( someone else's family-documentation ) and then presented as fine art.
kids photographs in toy cameras documenting the shrub infront of aunt millie's house, snap shots to some fine art to others.

fine art - art - photography - snapshots ...
its all the same ...