Honestly I haven't had the opportunity to use the detail tool to it's full capacity yet. I am just now concluding a project involving over 200 details, but they are all developed as strictly 2D (for reasons I don't have time to go into).
The border has not been a problem for me since I have always used a mask around my details (all drawings in fact) and it covers the automatically created border. I use a library part for this which also titles the drawing and sizes it to fit the sheet, but you could do the same thing with a white fill. You will just have to bring your column lines, etc. to the top to overlay the mask fill.
The other (probably easiest) solution is to make the border pen white. There doesn't seem to be any way to turn it off.