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Share-Based Compensation - Schedule of Share-Based Compensation Arrangement by Share Based Payment Award Options Outstanding and Options Exercisable (Detail)
shares in Millions
12 Months Ended
Jun. 30, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number outstanding at June 30,2018, Options outstanding | shares 6.3
Weighted average remaining contractual life (years), Options outstanding 3 years 1 month 2 days
Weighted average exercise price, Options outstanding $ 24.50
Number exercisable at June 30, 2018, Options exercisable | shares 6.3
Weighted average exercise price, Options exercisable $ 24.50
$ 14.88 - 19.47 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of exercise prices, minimum 14.88
Range of exercise prices, maximum $ 19.47
Number outstanding at June 30,2018, Options outstanding | shares 1.6
Weighted average remaining contractual life (years), Options outstanding 2 years 10 months 13 days
Weighted average exercise price, Options outstanding $ 18.50
Number exercisable at June 30, 2018, Options exercisable | shares 1.6
Weighted average exercise price, Options exercisable $ 18.50
$ 21.29 - 26.02 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of exercise prices, minimum 21.29
Range of exercise prices, maximum $ 26.02
Number outstanding at June 30,2018, Options outstanding | shares 1.0
Weighted average remaining contractual life (years), Options outstanding 2 years 7 months 2 days
Weighted average exercise price, Options outstanding $ 23.55
Number exercisable at June 30, 2018, Options exercisable | shares 1.0
Weighted average exercise price, Options exercisable $ 23.55
$ 26.49 - 26.49 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of exercise prices, minimum 26.49
Range of exercise prices, maximum $ 26.49
Number outstanding at June 30,2018, Options outstanding | shares 1.6
Weighted average remaining contractual life (years), Options outstanding 3 years 2 months 19 days
Weighted average exercise price, Options outstanding $ 26.49
Number exercisable at June 30, 2018, Options exercisable | shares 1.6
Weighted average exercise price, Options exercisable $ 26.49
$ 27.07 - 37.73 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of exercise prices, minimum 27.07
Range of exercise prices, maximum $ 37.73
Number outstanding at June 30,2018, Options outstanding | shares 2.1
Weighted average remaining contractual life (years), Options outstanding 3 years 4 months 24 days
Weighted average exercise price, Options outstanding $ 27.94
Number exercisable at June 30, 2018, Options exercisable | shares 2.1
Weighted average exercise price, Options exercisable $ 27.94