Inventories (Schedule Of Inventories) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Inventories [Abstract]
Finished goods	$ 489.1	$ 405.3
Work in process	29.9	29.3
Raw materials, supplies and other	258.2	208.2
Total FIFO value	777.2	642.8
Less: Excess of FIFO cost over LIFO cost	(95.8)	(71.2)
Inventories	681.4	571.6
Percentage of LIFO inventories	42.30%	40.50%
Effect of LIFO inventory liquidation on income	$ 0	$ 0	$ 0