Stock-Based Compensation - Grants Valuation Assumptions (Details) - Stock Option [Member]		6 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Assumptions used in valuation of stock options
Risk-free interest rate		1.40%	1.50%
Expected life	[1]	4 years 6 months	4 years 6 months
Expected volatility	[2]	31.00%	32.50%
Expected dividend yield		2.00%	1.60%

[1] Expected life is derived from historical experience.

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