XML 114 R81.htm IDEA: XBRL DOCUMENT v3.10.0.1
Leases (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Leases [Abstract]      
Rent expense $ 31.6 $ 32.1 $ 42.1