Retirement Plans (Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Net periodic benefit cost	$ 0.3	$ 0.7	$ 0.7	$ 1.4
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan, Service Cost	0.4	0.5	0.8	1.0
Defined Benefit Plan, Interest Cost	5.0	1.6	10.0	3.2
Defined Benefit Plan, Expected Return on Plan Assets	(6.0)	(2.2)	(11.9)	(4.3)
Amortization of actuarial net loss	$ 0.9	$ 0.8	$ 1.8	$ 1.5