Know when to go into detail
The best managers know when and how to go into detail. Inexperienced managers make one of two mistakes. Some micromanage tasks to the point of doing work for their employees, which is not scalable (i've been through it). Others delegate tasks to such an extent that they are not well executed or are not carried out in a manner aligned with the goals of the organization (i have also gone through this).
Good managers know when to go into detail and when to let their subordinates take the ball and move on. They know what questions to ask, when to check in, and when to leave things as they are. They understand that just because something is not done as they would do, it does not mean it has not been done well.