Chuck Liddell Finalizes Divorce From Wife Heidi

Chuck Liddell and his wife Heidi have officially finalized their divorce ... bringing a close to a longtime split.

The former MMA star and his ex-wife of more than a decade settled their divorce earlier this week, according to documents obtained by TMZ ... almost four years after he initially filed.

According to documents, Chuck and Heidi are sharing joint legal and physical custody of their two minor children ... with the two alternating holidays every year.

Chuck will pay $5K a month in child support and several major expenses, including private school and college tuition -- putting $700K in an education fund to do so. He's will also cover out-of-pocket medical expenses and the cost of…