Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefits - Narrative (Details)

v3.5.0.2
Retirement Benefits - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]        
Postemployment Benefits, Period Expense $ 0.0 $ (0.1) $ 0.2 $ 0.1
Defined Contribution Plan, Cost Recognized $ 2.4 $ 2.4 $ 7.0 $ 6.9