1
general::
Mete out or partake of something equally, as in Mom told the children to share and share alike with their Halloween candy. This term, first recorded about 1566, alluded to the equal apportioning of spoils and soon was broadened to include equal sharing in the costs of a venture and other undertakings or possessions.
American Heritage Idioms
2
general::
Phrase(s): share and share alike
Cliché having or taking equal shares. • I kept five and gave the other five to Mary—share and share alike. • The two roommates agreed that they would divide expenses—share and share alike.
McGrawhill's American Idioms And Phrasal Verbs