Retirement Benefits - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Compensation and Retirement Disclosure [Abstract] | ||
| Postemployment Benefits, Period Expense | $ 0.1 | $ 0.1 |
| Defined Contribution Plan, Cost Recognized | $ 2.3 | $ 2.1 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Period expense related to postemployment benefits. No definition available.
|