How does your school define a combined degree?
My university offered a "medial", which effectively gave you two concentrations. However, a medial was 7.0 credits in each field, while a regular major was 10.0 credits. The result was, you were at a disadvantage vs. people with a single degree because you didn't have a "full" degree in either field. This was a big deal for grad schools, probably less so with jobs.
I imagine there are some fields were the medial would be very beneficial (urban planning comes to mind). But if you are splitting a degree this way, just be sure the advantage outweighs the downside (i.e., some people might not think you're qualified for a given job).
If you're talking about a double major where you complete two full degrees, then that's another story and you've got nothing to worry about. That would, imo, be highly beneficial whatever you want to do.