Stock Repurchase (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2015	May. 15, 2015
Equity [Abstract]
Stock repurchase program, number of shares authorized to be repurchased		20.0
Repurchase of common stock	8.6
Value of shares repurchased	$ 363.8
Treasury stock, number of shares held	24.4