Fiscal Year 2016 Share Repurchase (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended	6 Months Ended	12 Months Ended
	Feb. 10, 2016	Mar. 31, 2016	Feb. 29, 2016	Jun. 30, 2015	Jun. 30, 2014	Sep. 15, 2015	Sep. 14, 2015
Class of Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method					$ 197.6
Percent of advance payment under accelerated share repurchase agreement		80.00%		80.00%
FY2016 Stock Repurchase Plan [Member] [Member] [Domain]
Class of Stock [Line Items]
Stock repurchase program, authorized value						$ 200.0	$ 200.0
Treasury Stock, Value, Acquired, Cost Method		$ 200.0
Treasury Stock, Shares, Acquired	0.9	2.3	3.2
Accelerated Share Repurchases, Final Price Paid Per Share		$ 62.92
Accelerated Share Repurchases, Initial Price Paid Per Share		$ 70.35