A bill at the Legislature could substantially reshape child custody negotiations for divorcing parents.

A mentally fit and safe parent typically gets 25 percent of custody and time with the child, the remaining 50 percent divvied up by a judge unless parents agree on their own. On Friday, the Senate Finance Committee considers Senate File 1402, giving each parent 40 percent, with 20 percent open to negotiation.

It is supported by fathers'-rights advocates, citing a history of mothers getting larger shares of child custody and research showing children benefit with both parents are involved.

Opponents say the change is too restrictive for modern families, with some single parents unable to commit 40 percent of their time to raising their children.