Restructuring Charges (Schedule of Restructuring Activities and Related Accruals) (Details) - USD ($) $ in Millions		3 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Restructuring and related costs	[1]	$ 8.0	$ 18.5
Project Fuel
Restructuring Reserve [Roll Forward]
Beginning Balance		9.5
Restructuring and related costs		8.0	$ 18.5
Other	[2]	0.0
Utilized - Cash Payments		(9.0)
Utilized - Non-Cash		0.0
Ending Balance		8.5
Employee Severance [Member] | Project Fuel
Restructuring Reserve [Roll Forward]
Beginning Balance		8.2
Restructuring and related costs		1.3
Other	[2]	0.0
Utilized - Cash Payments		(2.6)
Utilized - Non-Cash		0.0
Ending Balance		6.9
Asset Impairment and Accelerated Depreciation [Member] | Project Fuel
Restructuring Reserve [Roll Forward]
Beginning Balance		0.0
Restructuring and related costs		0.0
Other	[2]	0.0
Utilized - Cash Payments		0.0
Utilized - Non-Cash		0.0
Ending Balance		0.0
Other Restructuring [Member] | Project Fuel
Restructuring Reserve [Roll Forward]
Beginning Balance		1.3
Restructuring and related costs		6.7
Other	[2]	0.0
Utilized - Cash Payments		(6.4)
Utilized - Non-Cash		0.0
Ending Balance		$ 1.6

[1] Includes pre-tax SG&A of $1.9 and $1.4 for the three months ended December 31, 2019 and 2018, respectively, associated with certain information technology enablement expenses for Project Fuel.

[2] Includes the impact of currency translation.