CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Jun. 30, 2013
Trade receivables, allowances	$ 17.8	$ 14.5
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, at cost, shares	4,900,000	400,000
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.0001
Common stock, shares authorized	800,000,000	800,000,000
Common stock, shares issued	93,500,000	73,600,000
Common stock, shares outstanding	88,600,000	73,200,000
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	367,800,000	367,800,000
Common stock, shares issued	292,600,000	310,600,000
Common stock, shares outstanding	292,600,000	310,600,000