Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 93.9	$ 32.6	$ 180.6	$ 124.3
Other Comprehensive (Loss) Income, net of tax (Note 7):
Derivative instruments designated as hedges	(6.7)	(9.4)	(32.4)	(15.0)
Foreign currency translation adjustment	17.1	4.1	8.6	(13.1)
Change in pension and postretirement defined benefit plans	1.0	0.4	(5.9)	1.3
Total Other Comprehensive Income (Loss), net of tax	11.4	(4.9)	(29.7)	(26.8)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 105.3	$ 27.7	$ 150.9	$ 97.5