|
Share-Based Compensation (Compensation Cost Recognized in Income Statement) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Mar. 31, 2015
|
Mar. 31, 2014
|
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Before-Tax Share-Based Compensation | $ 12.9 | $ 11.6 | $ 24.8 | $ 23.4 |
| Income Tax Benefit | (4.7) | (3.9) | (8.7) | (8.2) |
| After-Tax Share-Based Compensation | $ 8.2 | $ 7.7 | $ 16.1 | $ 15.2 |