Stockholders' Equity Fiscal Year 2013 Share Repurchase Plan (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended		13 Months Ended	15 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Mar. 31, 2013	Jul. 31, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Jul. 31, 2013	Sep. 30, 2013	Aug. 01, 2013
Treasury Stock, Value, Acquired, Cost Method								$ 197.6
PercentOfSharesReceivedUnderASR							80.00%
FiscalYear2013StockRepurchasePlan [Member]
Stock Repurchase Program, Authorized Amount											$ 200.0
Treasury Stock, Value, Acquired, Cost Method										$ 200.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount								2.4
Treasury Stock, Shares, Acquired										5,458,285
Treasury Stock Acquired, Average Cost Per Share										$ 36.64
September 2012 Accelerated Share Repurchase [Member]
Treasury Stock, Value, Acquired, Cost Method						$ 50.0		50.0
Treasury Stock, Shares, Acquired		1,328,462		234,898		1,563,360
Treasury Stock Acquired, Average Cost Per Share						$ 31.98
March 2013 Accelerated Share Repurchase [Member]
Treasury Stock, Value, Acquired, Cost Method					$ 50.0			$ 50.0
Treasury Stock, Shares, Acquired	1,044,932		101,247		1,146,179
PercentOfSharesReceivedUnderASR								80.00%
Treasury Stock Acquired, Average Cost Per Share					$ 43.62			$ 38.28
September Open Market Repurchases [Member]
Treasury Stock, Value, Acquired, Cost Method								$ 50.0
Open Market Repurchases [Member]
Treasury Stock, Value, Acquired, Cost Method								$ 97.6	$ 100.0
Treasury Stock, Shares, Acquired			51,071					2,697,675	2,748,746
Treasury Stock Acquired, Average Cost Per Share								$ 36.17	$ 36.38