XML 79 R60.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share-Based Compensation (Compensation Cost Recognized in Income Statement) (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]    
Before-tax share-based compensation cost $ 11.8 $ 9.0
Income tax benefit (3.2) (3.0)
After-tax share-based compensation cost $ 8.6 $ 6.0