Mich. Comp. Laws § 557.212

Sec. 12. In the event of a divorce from the bond of matrimony or from bed and board by decree of any court of competent jurisdiction, community property shall be divided between the parties by the court granting the decree, in such proportions and in such manner as such court, from the facts in the case, shall deem just, proper, and equitable. The respective interests of the parties in any community property which is not divided by such decree shall thereafter be deemed to be those of tenants in common.