CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Current assets:
Allowance for doubtful accounts	$ 4.6	$ 3.7
STOCKHOLDERS’ EQUITY
Common stock, authorized shares (in shares)	100,000,000	100,000,000
Common stock, issued shares (in shares)	56,012,748	55,808,743
Common stock, outstanding shares (in shares)	47,850,468	47,470,363
Common stock in treasury, shares (in shares)	8,162,280	8,338,380