Stock-Based Compensation - Assumptions Used to Determine Fair Values of Stock Option Grants (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Graded Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.10%	1.30%	1.40%
Dividend yield	2.30%	3.20%	2.60%
Weighted-average volatility factor	26.40%	25.70%	28.10%
Weighted-average expected life (in years)	6 years 10 months 24 days	6 years 9 months 18 days	6 years 7 months 6 days
Weighted-average fair value (in dollars)	$ 8.19	$ 3.78	$ 5.01
Cliff Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.30%
Dividend yield	2.30%
Weighted-average volatility factor	26.40%
Weighted-average expected life (in years)	7 years 8 months 12 days
Weighted-average fair value (in dollars)	$ 8.76