Discontinued Operations (Schedule of Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2011
Assets and Liabilities of Discontinued Operations [Line Items]
Cash and cash items	$ 0	$ 1.1	$ 1.9
Trade receivables, net	14.9	213.4
Inventories	0.8	11.2
Other current assets	0.2	17.5
Total Current Assets	15.9	243.2
Plant and equipment, net	25.7	189.3
Goodwill	0	96.2
Other noncurrent assets	0	3.4
Total Noncurrent Assets	25.7	288.9
Payables and accrued liabilities	6.1	42.1
Accrued income taxes	0	0.5
Short-term borrowings	0	0.7
Total Current Liabilities	6.1	43.3
Other noncurrent liabilities	0.3	12.4
Deferred income taxes	0	11.9
Total Noncurrent Liabilities	$ 0.3	$ 24.3