Ok whether I do my bags on the return to IAD at the midfield or main terminal, how much time do I need to do that and get my bags rechecked with DL for an ongoing flight to Detroit/Milwaukee? I'm not sure if I'll be able to do the connection to get home that same day/night . . . or if I'll have to stay in NoVA and fly home the next morning/afternoon.

(Again, I'm booking these as two separate trip itineraries, on separate airlines.)