XML 40 R30.htm IDEA: XBRL DOCUMENT v3.7.0.1
Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Income Tax Disclosure [Abstract]        
Effective Income Tax Rate Reconciliation, Percent 33.40% 34.50% 33.10% 33.20%
Unrecognized tax benefit $ 17.5   $ 17.5