Share-Based Compensation (Compensation Cost Recognized in Income Statement) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
Before-Tax Share-Based Compensation | $ 41.2 | $ 38.8 | $ 40.7 |
Discontinued Operations | |||
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
Before-Tax Share-Based Compensation | 0.0 | 0.0 | 0.8 |
Continuing Operations | |||
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||
Before-Tax Share-Based Compensation | 41.2 | 38.8 | 39.9 |
Income Tax Benefit | (9.7) | (9.1) | (14.0) |
After-Tax Share-Based Compensation | $ 31.5 | $ 29.7 | $ 25.9 |