Restructuring and Other Charges (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 20.8	$ 0.9
Restructuring provision	$ 1.8	$ 16.7	7.6	17.8
Utilized - cash			(15.2)	(1.4)
Utilized - noncash			(0.9)	(1.5)
Foreign currency translation			0.7	0.0
Ending Balance	13.0	15.8	13.0	15.8
Employee Severance and Termination Benefits
Restructuring Reserve [Roll Forward]
Beginning Balance			19.8	0.9
Restructuring provision			3.5	15.3
Utilized - cash			(13.1)	(1.2)
Utilized - noncash			0.0	0.0
Foreign currency translation			0.6	0.0
Ending Balance	10.8	15.0	10.8	15.0
Property, Plant and Equipment Impairment
Restructuring Reserve [Roll Forward]
Beginning Balance			0.0	0.0
Restructuring provision			0.9	1.5
Utilized - cash			0.0	0.0
Utilized - noncash			(0.9)	(1.5)
Foreign currency translation			0.0	0.0
Ending Balance	0.0	0.0	0.0	0.0
Other Costs
Restructuring Reserve [Roll Forward]
Beginning Balance			1.0	0.0
Restructuring provision			3.2	1.0
Utilized - cash			(2.1)	(0.2)
Utilized - noncash			0.0	0.0
Foreign currency translation			0.1	0.0
Ending Balance	2.2	0.8	2.2	0.8
Access Equipment
Restructuring Reserve [Roll Forward]
Restructuring provision	0.0	16.7	3.3	17.4
Commercial
Restructuring Reserve [Roll Forward]
Restructuring provision	1.8	0.0	4.3	0.4
Cost of Sales
Restructuring Reserve [Roll Forward]
Restructuring provision	0.8	16.7	4.7	17.4
Cost of Sales | Access Equipment
Restructuring Reserve [Roll Forward]
Restructuring provision	0.0	16.7	3.3	17.4
Cost of Sales | Commercial
Restructuring Reserve [Roll Forward]
Restructuring provision	0.8	0.0	1.4	0.0
Selling, General and Administrative Expenses
Restructuring Reserve [Roll Forward]
Restructuring provision	1.0	0.0	2.9	0.4
Selling, General and Administrative Expenses | Access Equipment
Restructuring Reserve [Roll Forward]
Restructuring provision	0.0	0.0	0.0	0.0
Selling, General and Administrative Expenses | Commercial
Restructuring Reserve [Roll Forward]
Restructuring provision	$ 1.0	$ 0.0	$ 2.9	$ 0.4