OTHER COMPREHENSIVE INCOME (Schedule of Changes in AOCL by Component) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Other comprehensive income (loss)
Tax effect	$ 1.3	$ 5.1	$ 4.9
Total Other Comprehensive Loss, Net of Tax	(28.3)	(66.7)	(38.4)
Accumulated other comprehensive loss
Beginning balance	1,146.9
Net activity	(28.3)	(66.7)	(38.4)
Ending balance	1,227.2	1,146.9
Available-for-Sale Securities and Hedges [Member]
Other comprehensive income (loss)
Prior to reclassification	(4.9)	(0.6)
Reclassification from	(0.1)	0.6
Pre-tax	(5.0)
Tax effect	1.9
Total Other Comprehensive Loss, Net of Tax	(3.1)
Accumulated other comprehensive loss
Beginning balance
Net activity	(3.1)
Ending balance	(3.1)
Foreign Currency Translation Adjustment [Member]
Other comprehensive income (loss)
Prior to reclassification	(22.4)	(58.6)
Reclassification from
Pre-tax	(22.4)	(58.6)
Tax effect
Total Other Comprehensive Loss, Net of Tax	(22.4)	(58.6)
Accumulated other comprehensive loss
Beginning balance	(92.8)	(34.2)
Net activity	(22.4)	(58.6)
Ending balance	(115.2)	(92.8)	(34.2)
Change in Pension and Postretiremen Defined Benefit Plans [Member]
Other comprehensive income (loss)
Prior to reclassification	(8.5)	(28.7)
Reclassification from	4.4	15.5
Pre-tax	(4.1)	(13.2)
Tax effect	1.3	5.1
Total Other Comprehensive Loss, Net of Tax	(2.8)	(8.1)
Accumulated other comprehensive loss
Beginning balance	(48.0)	(39.9)
Net activity	(2.8)	(8.1)
Ending balance	(50.8)	(48.0)	(39.9)
Accumulated Other Comprehensive Income (Loss) [Member]
Other comprehensive income (loss)
Prior to reclassification	(35.8)	(87.9)
Reclassification from	4.3	16.1
Pre-tax	(31.5)	(71.8)
Tax effect	3.2	5.1
Total Other Comprehensive Loss, Net of Tax	(28.3)	(66.7)
Accumulated other comprehensive loss
Beginning balance	(140.8)	(74.1)
Net activity	(28.3)	(66.7)
Ending balance	$ (169.1)	$ (140.8)	$ (74.1)