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Earnings Per Share - Denominators of Basic and Diluted EPS Computations (Detail) - shares
shares in Millions
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Weighted-average shares outstanding:      
Basic (in shares) 119.9 119.6 121.9
Common stock equivalents 4.1 4.5 3.5
Diluted 124.0 124.1 125.4