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Share-Based Compensation - Schedule of Share-Based Compensation Arrangement by Share Based Payment Award Options Outstanding (Detail)
shares in Millions
 3 Months Ended
Sep. 30, 2015
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Options outstanding at beginning of period, Number of shares | shares 12.5
Options granted, Number of shares | shares 0.0
Options exercised, Number of shares | shares (1.4)
Options canceled or expired, Number of shares | shares 0.0
Options outstanding at end of year, Number of shares | shares 11.1
Options exercisable at end of period, Number of shares | shares 9.4
Options outstanding at beginning of period, Weighted average exercise price $ 23.49
Options granted, Weighted average exercise price 0
Options exercised, Weighted average exercise price 18.90
Options canceled or expired, Weighted average exercise price 0
Options outstanding at end of year, Weighted average exercise price 24.09
Options exercisable at end of period, Weighted average exercise price $ 23.66