Share Repurchases (Details)	3 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares	1,680,395
Stock Repurchased During Period, Value | $	$ 200,400,000
Treasury Stock Acquired, Average Cost Per Share | $ / shares	$ 119.23
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	4,570,266
Stock Repurchase Program Cumulative Number Of Shares Repurchased	3,860,996