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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, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Payments for Repurchase of Common Stock |  |  | $ 125,541 | $ 158,762 | $ 143,224
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 |  |  |
Purchases of treasury stock, shares | 458 | 2,048 |  | 2,506 |

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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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