The Higher Power stuff does nothing for me so I just ignore it. I think the core point of the HP references is in the concept of letting go. Some people find it incredibly hard to let go of their attempts at controlling the uncontrollable. For them, it can be helpful to couch it in terms of "let go of it yourself and let God/HP take the responsibility instead". For me, the important part of that is the "let go of it yourself" bit.
Regarding detachment, I tend to think of it like this. When you're in a relationship with an alcoholic and are emotionally involved with their drinking, you're on a roller-coaster with them. Sometimes it's up, sometimes it's down, sometimes it can even be fun and sometimes it's downright terrifying. But the crucial thing is that you'll get the same experience over and over again. That's just the deal with alcoholism.
Detachment means to get off that roller-coaster. To turn your back to it and go and do something more fun instead. That doesn't necessarily mean walking away from the entire relationship, but it does mean working hard to stop monitoring their drinking, stop being involved in cleaning up or covering up, stop financing their drinking, and to stop trying to control their drinking. Let it go.
To let go of that doesn't mean that you are condoning it. It's about reducing your emotional involvement in trying to control something that is entirely outside your control. Whether you condone it or not, you're not going to make any substantial difference to their drinking. Be honest - if you think about all your attempts to make it clear that you are not condoning it, has it stopped them drinking? I would guess not.
Enabling isn't about taking blame for their drinking. You don't hold the glass up to their mouths and force them to drink it. The responsibility for their drinking is theirs. The issue with enabling is that it helps them to avoid experiencing the full consequences of their drinking while also keeping you embroiled in the drama. It's not healthy for either of you.