Retirement and Other Benefit Plans (Schedule Of Reconciliation Of Benefit Obligation) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Net benefit obligation at beginning of year	$ 93.6	$ 92.5
Interest cost	3.9	3.8	$ 4.0
Actuarial loss	11.1	4.5
Gross benefits paid	(7.8)	(7.2)
Settlements	(0.2)	0.0
Net benefit obligation at end of year	$ 100.6	$ 93.6	$ 92.5