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Share-based Payments (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 9 Months Ended |
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Sep. 30, 2014
Compensation expense |  |  |
Recognized compensation expense | $ 98.1 | $ 26.0 |
Accelerated compensation expense | 43.9 |  |
Accelerated settlement Of Common Stock | 17.6 |  |
Award settlement Of Cash | 26.3 |  |
Unrecognized compensation expense | $ 145.4 |  | $ 62.4
Vesting period | 3 years |  |
Employee Stock Option |  |  |
Number of Options |  |  |
Balance at the beginning of the period (in shares) | 1.6 | 1.6 |
Granted (in shares) |  | 0.6 |
Exercised (in shares) | (0.3) | (0.4) |
Cancelled (in shares) |  | (0.1) |
Balance at the end of the period (in shares) | 1.3 | 1.7 |
Vested and expected to vest in the future at the end of the period (in shares) | 1.3 | 1.7 |
Stock options, Weighted Average Exercise Price |  |  |
Balance at the beginning of the period (in dollars per share) | $ 27.69 | $ 24.73 |
Granted (in dollars per share) |  | 31.62 |
Exercised (in dollars per share) | 25.02 | 22.99 |
Cancelled (in dollars per share) |  | 26.86 |
Balance at the end of the period (in dollars per share) | 28.22 | 27.57 |
Vested and expected to vest in the future at the end of the period (in dollars per share) | $ 28.22 | 27.57 |
Performance Earnings Program |  |  |
Compensation expense |  |  |
Vesting period | 3 years |  |
Weighted average grant-date fair value of stock options granted (in dollars per share) | $ 32.32 | 29.32 |
Restricted Stock Units (RSUs) |  |  |
Compensation expense |  |  |
Granted (in shares) | 2.6 |  |
Granted (in dollars per share) | $ 30.04 |  |
Weighted average grant-date fair value of stock options granted (in dollars per share) | $ 31.06 | $ 29.50 |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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