STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 122.8	$ 46.8	$ 60.6
Other Comprehensive Loss, Net of Tax:
Available-for-sale securities and hedges	(3.1)		0.3
Foreign currency translation adjustment	(22.4)	(58.6)	(29.6)
Change in pension and postretirement defined benefit plans	(2.8)	(8.1)	(9.1)
Total Other Comprehensive Loss, Net of Tax	(28.3)	(66.7)	(38.4)
Total Comprehensive Income (Loss)	94.5	(19.9)	22.2
Less: Comprehensive loss attributable to noncontrolling interests	(1.3)	(0.9)
Total Comprehensive Income (Loss) Attributable to Common Shareholders	$ 95.8	$ (19.0)	$ 22.2