Okay, here it is. Per Lynn Henning (who I despise) on Twitter:
Cubs get: Justin Wilson and Alex Avila
Tigers get: Jeimer Candelario and Isaac Paredes, and PTBNL or cash.
Candelario is arguably the Cubs' #1 prospect, a 3B in AAA. Paredes is an 18 year old SS in A-ball.
EDIT: Here's the link to Henning's tweet: