The point of delegating is I can trust you to do the job with the instructions given. If I need more detailed instructions that lowers the value of delegation - eventually I can do the job myself faster. Sometimes I will spend extra time to teach someone how to do a job even though I could do it faster - but I expect that they will do this (or a similar) job again in the future without instruction.

Employees that I can give minimal instructions to and get good results are more valuable that those who need details instructions.

None of the above has anything to do with my ability to delegate. Sometimes it has something to with my ability to tell the skill of the person I delegate to.