Shareholders' Equity and Share-Based Compensation - Schedule of Fair Value of Each Option Award Estimated on Date of Grant Using Black-Scholes Option Valuation Model (Detail) - $ / shares	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility minimum	31.60%	32.70%	41.80%
Expected volatility maximum	39.30%	55.40%	60.30%
Weighted-average volatility	35.90%	45.80%	50.00%
Expected annual dividend	$ 1.32	$ 1.20	$ 0.60
Risk-free rate minimum	0.40%	0.30%	0.20%
Risk-free rate maximum	1.40%	1.80%	1.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years 1 month 13 days	2 years 18 days	2 years 3 months 26 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	4 years 5 months 16 days	4 years 7 months 28 days	6 years 3 months