Pension And Other Postretirement Benefits (Schedule Of Change In Benefit Obligation And Fair Value Of Plan Assets, Statement Of Funded Status, And Amounts Recognized In The Consolidated Balance Sheet)(Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Change in fair value of plan assets
Fair value of plan assets at end of year	$ 241.2	$ 212.9
Pension Benefits [Member]
Change in benefit obligation
Benefit obligation at beginning of year	251.2	221.9
Service cost	6.1	6.7	5.1
Interest cost	13.0	13.1	12.6
Plan participants' contributions	0.8	0.8
Actuarial loss	24.8	18.3
Benefits paid	(11.4)	(9.9)
Amendments		0.2
Curtailments	(7.0)
Currency translation	(0.1)	0.1
Benefit obligation at end of year	277.4	251.2	221.9
Change in fair value of plan assets
Fair value of plan assets at beginning of year	212.9	172.4
Actual return on plan assets	17.3	18.0
Employer contributions	21.7	31.6
Plan participants' contributions	0.8	0.8
Benefits paid	(11.4)	(9.9)
Currency translation	(0.1)
Fair value of plan assets at end of year	241.2	212.9	172.4
Funded status	(36.2)	(38.3)
Amounts recognized in assets or liabilities
Other current liabilities	(0.6)	(0.6)
Other liabilities	(35.6)	(37.7)
Net amount recognized	(36.2)	(38.3)
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss	93.5	79.1
Prior service cost (credit)	2.1	2.5
Total	95.6	81.6
Weighted-average assumptions used to determine benefit obligation
Discount rate	4.80%	5.40%
Rate of compensation increase	3.00%	3.25%
Other Benefits [Member]
Change in benefit obligation
Benefit obligation at beginning of year	100.4	88.3
Service cost	2.6	2.9
Interest cost	5.4	5.2
Actuarial loss	19.9	5.7
Benefits paid	(1.7)	(2.9)
Medicare reimbursements	0.2	0.2
Amendments		0.9
Currency translation	(0.1)	0.1
Benefit obligation at end of year	126.7	100.4
Change in fair value of plan assets
Employer contributions	1.5	2.7
Medicare reimbursements	0.2	0.2
Benefits paid	(1.7)	(2.9)
Funded status	(126.7)	(100.4)
Amounts recognized in assets or liabilities
Other current liabilities	(2.8)	(2.5)
Other liabilities	(123.9)	(97.9)
Net amount recognized	(126.7)	(100.4)
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss	32.0	12.3
Prior service cost (credit)	(3.8)	(4.9)
Total	$ 28.2	$ 7.4
Weighted-average assumptions used to determine benefit obligation
Discount rate	5.03%	5.40%
Rate of compensation increase	3.00%	3.25%