Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefits - Narrative (Details)

v3.4.0.3
Retirement Benefits - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]        
Postemployment Benefits, Period Expense $ 0.1 $ 0.1 $ 0.2 $ 0.2
Defined Contribution Plan, Cost Recognized $ 2.3 $ 2.4 $ 4.6 $ 4.5