Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2016	Jun. 30, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts - trade receivables - Current	$ 45.6	$ 38.1
Allowance for doubtful accounts - trade receivables - Long-term	$ 0.8	$ 0.5
Preferred stock, par value	$ 1	$ 1.00
Preferred stock, shares authorized	300,000.0	300,000.0
Preferred stock, shares issued	0	0
Common stock, par value (usd per share)	$ 0.1	$ 0.10
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	638,700,000	638,700,000
Common stock, shares outstanding	448,900,000	455,700,000
Treasury stock, shares	189,800,000	183,000,000