SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
The composition of Accumulated Other Comprehensive Income (Loss) is as follows:
Available-for-sale securities and currency hedges, net of tax of $0.2, $0.4 and $0.4, respectively	$ (0.4)	$ (0.9)	$ (0.7)
Foreign currency translation adjustment, net of tax of $0.1, ($1.7) and ($2.2), respectively	(17.2)	(15.7)	(11.9)
Items not yet recognized as a component of net periodic pension and postretirement healthcare costs, net of tax of $36.6, $38.2 and $29.3, respectively	(60.4)	(62.4)	(49.2)
Total	(78.0)	(79.0)	(61.8)
Available-for-sale securities and currency hedges, tax	0.2	0.4	0.4
Foreign currency translation adjustment, tax	0.1	(1.7)	(2.2)
Items not yet recognized as a component of net periodic pension and postretirement healthcare costs, tax	$ 36.6	$ 38.2	$ 29.3