Upon death of a married person, one-half of the property to which sections 45a-458 to 45a-466, inclusive, apply is the property of the surviving spouse and is not subject to testamentary disposition by the decedent or distribution under the laws of succession of this state. One-half of such property is the property of the decedent and is subject to testamentary disposition or distribution under the laws of succession of this state. With respect to property to which sections 45a-458 to 45a-466, inclusive, apply, the one-half of the property which is the property of the decedent is not subject to the right of the surviving spouse to elect against the will.