Business Combinations (Merger And Integration Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Merger And Integration Costs [Line Items]
Merger and integration costs	$ 2.5	$ 33.1	$ 32.0
Cost Of Goods Sold [Member]
Merger And Integration Costs [Line Items]
Merger and integration costs		5.2	2.5
Selling, General, And Administrative Expense [Member]
Merger And Integration Costs [Line Items]
Merger and integration costs	0.6	6.4	29.5
Other Operating Expense, Net [Member]
Merger And Integration Costs [Line Items]
Merger and integration costs	$ 1.9	$ 21.5