XML 69 R57.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt - Effective Interest Rate (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Debt    
Effective interest rate including effects of interest rate swap agreements 4.7% 4.8%
Amortization of deferred debt issuance costs $ 2.4 $ 2.9