Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018
Current assets
Accounts receivable allowances	$ 20.5	$ 14.4
Shareholders’ equity
Redeemable, convertible Series A preferred stock, par value per share (in usd per share)	$ 1.00	$ 1
Redeemable, convertible Series A preferred stock, liquidation preference per share (in usd per share)	$ 1,000	$ 1,000
Redeemable, convertible Series A preferred stock, shares authorized (in shares)	2,500,000.0	2,500,000.0
Redeemable, convertible Series A preferred stock, shares issued (in shares)	700,000	700,000
Preferred stock, par value per share (in usd per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	2,500,000.0	2,500,000.0
Preferred stock, shares issued (in shares)	0	0
Common stock
Shareholders’ equity
Common stock, par value per share (in usd per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	80,000,000.0	80,000,000.0
Common stock, shares issued (in shares)	40,100,000	39,800,000
Common stock, shares outstanding (in shares)	40,100,000	39,800,000
Common stock, treasury (in shares)	24,800,000	24,800,000
Class B stock $1 par value
Shareholders’ equity
Common stock, par value per share (in usd per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	15,000,000.0	15,000,000.0
Common stock, shares issued (in shares)	5,100,000	5,100,000
Common stock, shares outstanding (in shares)	5,100,000	5,100,000