Stock-Based Compensation - Assumptions Used in Black-Scholes Valuation for Grants (Details) - Stock Option [Member]		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Assumptions used in valuation of stock options
Risk-free interest rate		1.50%	1.30%	0.60%
Expected life (years)	[1]	4 years 6 months	4 years 6 months	4 years 6 months
Expected volatility	[2]	32.50%	40.30%	49.50%
Expected dividend yield		1.70%	1.70%	1.50%

[1] Expected life is derived from historical experience.

[2] Expected volatility is based on the implied historical volatility of our stock.