Select one or more groups. > Group menu > Explode
The Explode command ungroups all objects in a group, regardless of the number of nested groups, unlike Ungroup, which ungroups one level only.
As with the Ungroup command, all exploded entities remain in the current selection set.
Warning: Ungroup and Explode remove all transform animations that have been applied to the group as a whole. As with the Ungroup command, all exploded entities remain in the current selection set.
Procedure
To explode a group:
Select one or more groups.
Choose Group > Explode.
All objects in the groups remain selected but no longer belong to groups. All nested groups are exploded. All group dummies in the selection are deleted.
Warning: Ungroup and Explode remove all transform animations that have been applied to the group as a whole.