Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 46,900,000	$ 49,500,000	$ 86,700,000
Other Comprehensive (Loss) Income, net of tax (Note 7):
Derivative instruments designated as hedges	(23,100,000)	(1,900,000)	(25,700,000)	$ (5,600,000)
Foreign currency translation adjustment	(31,600,000)	(3,600,000)	(8,500,000)	(17,200,000)
Change in pension and postretirement defined benefit plans	(7,600,000)	500,000	(6,900,000)	900,000
Total Other Comprehensive Income (Loss), net of tax	(62,300,000)	(5,000,000.0)	(41,100,000)	(21,900,000)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (15,400,000)	$ 44,500,000	$ 45,600,000	$ 69,800,000