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Share-Based Compensation - Schedule of Share-Based Compensation Arrangement by Share Based Payment Award Options Outstanding (Detail) - $ / shares
shares in Millions
 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Options outstanding at beginning of year, Number of shares 8.2 12.5 14.2
Options exercised, Number of shares (0.1) (4.3) (1.2)
Options canceled or expired, Number of shares (0.1)   (0.5)
Options outstanding at end of year, Number of shares 8.0 8.2 12.5
Options exercisable at end of year, Number of shares 7.5 6.7 9.6
Options vested and expected to vest, Number of shares 8.0 8.2 12.5
Options outstanding at beginning of year, Weighted average exercise price $ 24.52 $ 23.49 $ 23.30
Options exercised, Weighted average exercise price 14.81 21.51 20.17
Options canceled or expired, Weighted average exercise price 26.55   25.98
Options outstanding at end of year, Weighted average exercise price 24.67 24.52 23.49
Options exercisable at end of year, Weighted average exercise price 24.55 24.04 22.80
Options vested and expected to vest, Weighted average exercise price $ 24.67 $ 24.52 $ 23.49