Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefits - Narrative (Details)

v3.7.0.1
Retirement Benefits - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]          
Pension Contributions   $ 80.0      
Postemployment Benefits, Period Expense $ 0.1   $ 0.0 $ 0.3 $ 0.2
Defined Contribution Plan, Cost Recognized $ 2.7   $ 2.4 $ 8.4 $ 7.0