When some ideas are submitted to us, the idea comes through with 2 or 3 (or in some cases more!) ideas in it. We have a few custom fields that tie to each submitted idea - so what would be good is if there was a "Split Idea" button which essentially duplicated the idea, but then prompted you to remove all the detail in the summary, so that you can narrow it down to one specific idea.
Another way of implementing may be to click split idea, then a window comes up and asks you to highlight each individual idea. This would then create the relevant idea records and retain all the custom fields etc..