Retirement and Other Benefit Plans (Schedule Of Reconciliation Of Benefit Obligation) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Net benefit obligation at beginning of year	$ 92.5	$ 87.2
Interest cost	3.8	4.0	$ 3.6
Actuarial (gain) loss	4.5	5.1
Gross benefits paid	(7.2)	(3.8)
Net benefit obligation at end of year	$ 93.6	$ 92.5	$ 87.2