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Share-Based Compensation - Schedule of Share-Based Compensation Arrangement by Share Based Payment Award Options Outstanding (Detail)
shares in Millions
 9 Months Ended
Mar. 31, 2018
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Options outstanding at beginning of period, Number of shares | shares 8.0
Options granted, Number of shares | shares 0.0
Options exercised, Number of shares | shares (1.0)
Options canceled or expired, Number of shares | shares 0.0
Options outstanding at end of year, Number of shares | shares 7.0
Options exercisable at end of period, Number of shares | shares 7.0
Options outstanding at beginning of period, Weighted average exercise price | $ / shares $ 24.67
Options granted, Weighted average exercise price | $ / shares 0
Options exercised, Weighted average exercise price | $ / shares 24.99
Options canceled or expired, Weighted average exercise price | $ / shares 0
Options outstanding at end of year, Weighted average exercise price | $ / shares 24.62
Options exercisable at end of period, Weighted average exercise price | $ / shares $ 24.62