Regex help needed - match all after a hyphen

I'm trying to make a regex that matches all after a hyphen character. I have a coll that stores indices as symbols of "1-4", "22-2", etc. and I want to split them into the number before the hyphen and after with two regex objects.

My object for the characters before it works: regexp ([^-]*)-

regexp \-(.*) does not work, though my (limited) knowledge of regex says it should... anyone able to help?