I look at detachment as simply not caring about the end result. for instance there are many things I once cared strongly about and now no longer feel the attachment. so maybe its a different word but I liken it to detachment in this context. like once I feel that sense of "this is not impacting me" then I feel as though I have detached. maybe I truly haven't, or maybe its an entirely concept altogether, which is fine. its just the semantic I use to try and get myself out of a place of feeling lack in a certain area and a genuine "letting go".
This is really interesting
. I guess I look at it a little differently, maybe because of my situation.

For me detachment means that I am not so mentally fixated at all times on the end result being what I want and demanding details of when and how and why. However, I just don't think I can realistical
ly not care about the end result, at least not now and probably not any time within the next couple of months. I keep trying to think of it as hoping that the situation will play out as I want it to but also trusting that I will be given what I need by the universe even if it is not the end result I'm hoping for.
I guess this is getting off the topic of manifesting
... like I said above, I don't know if I believe that you can manifest things or an end result, really. But I do think that releasing some of the "stagnant" (as Pink said) and controlling energy can help to clear whatever blockage may be in the way between you and the result you desire.
I think detachment can also mean straight-up not caring anymore. Sigh, in some ways it would be nice to have already arrived at this point, but it's so difficult to get there...