You should be able to obtain that on line now in the county where you were divorced or go to that clerk's office in person to purchase a copy if it was prior to online records. You may also find that your mere representation on the marriage license that you were divorced in Florida is sufficient. The clerk's office where you want to get the license in Michigan can answer that for you.
You need to contact the Clerk of Courts for the county where you received your final judgment and request a copy of your final judgment. Find out from the marriage license office in Michigan whether you need a certified copy of your final judgment. Unfortunately, not all counties in Florida have divorce records available online.