Intellectual property is something unique that you physically create. An idea alone is not intellectual property. For example, an idea for a book doesn’t count, but the words you’ve written do.
Owning intellectual property
You own intellectual property if you:
created it (and it meets the requirements for copyright, a patent or a design)
bought intellectual property rights from the creator or a previous owner
have a brand that could be a trade mark, eg a well-known product name