Special Charges (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Special charges	$ 9,500,000	$ 6,200,000	$ 26,100,000	$ 17,700,000
Restructuring charges			4,900,000
Site Consolidation [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Special charges	400,000	1,500,000	1,600,000	6,500,000
Business Optimization [Member]
Restructuring Cost and Reserve [Line Items]
Special charges		$ 4,700,000		$ 11,200,000
Business Optimization [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Special charges	2,400,000		9,200,000
Global Restructuring Program [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Special charges	6,700,000		15,300,000
Restructuring charges	9,000,000.0		28,300,000
Property, Plant and Equipment [Member] | Global Restructuring Program [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,300,000		$ 13,000,000.0