Earnings Per Share (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Payments for Repurchase of Common Stock			$ 157,160	$ 141,488	$ 45,754
Purchases of treasury stock, shares	458	2,048
Goldman Sachs Accelerated Share Repurchase Program [Member]
Accelerated Share Repurchase Program, Execution Date		Jun. 02, 2015
Accelerated Share Repurchase Program, Completion Date	Sep. 03, 2015
Accelerated Share Repurchases, Final Price Paid Per Share	$ 49.89
Payments for Repurchase of Common Stock		$ 125,000
Dilutive effect of Accelerated Stock Repurchase shares			2,506