Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended		12 Months Ended	13 Months Ended			12 Months Ended	3 Months Ended		13 Months Ended	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2012 September 2012 Accelerated Share Repurchase [Member]	Mar. 31, 2013 September 2012 Accelerated Share Repurchase [Member]	Jun. 30, 2013 September 2012 Accelerated Share Repurchase [Member]	Mar. 31, 2013 March 2013 Accelerated Share Repurchase [Member]	Sep. 30, 2013 March 2013 Accelerated Share Repurchase [Member]	Sep. 30, 2012 March 2013 Accelerated Share Repurchase [Member]	Jun. 30, 2013 March 2013 Accelerated Share Repurchase [Member]	Jul. 31, 2013 March 2013 Accelerated Share Repurchase [Member]	Aug. 01, 2013 2012StockRepurchasePlan [Member]	Jun. 30, 2013 2012StockRepurchasePlan [Member]	Jun. 30, 2013 September Open Market Repurchases [Member]	Sep. 30, 2013 Open Market Repurchases [Member]	Sep. 30, 2012 Open Market Repurchases [Member]	Jul. 31, 2013 Open Market Repurchases [Member]	Sep. 30, 2013 March Open Market Repurchases [Member]
Class of Stock [Line Items]
Shares Paid for Tax Withholding for Share Based Compensation	144,048
Stock Repurchase Program, Remaining Authorized Repurchase Amount												$ 2.4
Stock repurchase program, authorized value											200
Treasury Stock, Value, Acquired, Cost Method		$ 197.6			$ 50.0		$ 50.0		$ 50.0				$ 50.0	$ 97.6		$ 100.0	$ 50.0
Treasury Stock, Shares, Acquired			1,328,462	234,898	1,563,360	1,044,932		101,247		1,146,179				2,697,675	51,071	2,748,746
Percent of advance payment under accelerated share repurchase agreement	80.00%								80.00%
Treasury Stock Acquired, Average Cost Per Share					$ 31.98				$ 38.28	$ 43.62				$ 36.17		$ 36.38