STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 152.2	$ 252.4	$ 132.3
Other Comprehensive Income (Loss), net of tax:
Derivative instruments and hedges	(10.4)	12.5	7.4
Foreign currency translation adjustment	(40.1)	(24.0)	33.9
Change in pension and postretirement defined benefit plans	(13.6)	8.5	17.8
Total Other Comprehensive Income (Loss), net of tax	64.1	3.0	(59.1)
Total Comprehensive Income	88.1	249.4	191.4
Less: Comprehensive loss attributable to noncontrolling interests	0.0	0.0	(1.3)
Total Comprehensive Income Attributable to Common Shareholders	$ 88.1	$ 249.4	$ 192.7