Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 06, 2017	Jan. 26, 2017	Sep. 21, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5.8	$ 1.1
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.9	0.4
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.9	0.7
Employee Severance and Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.7	1.1
Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.1
Access Equipment
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	73.0
Restructuring charges	3.3	0.7
Access Equipment | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.0	0.0
Access Equipment | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.3	0.7
Access Equipment | Operating Expense
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	30.0
Restructuring charges	13.0
Restructuring and Related Cost, Expected Cost Remaining	6.0
Commercial
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges			$ 4.0
Restructuring charges	2.5	0.4
Commercial | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.9	0.4
Commercial | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.6	0.0
Minimum | Access Equipment
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges				$ 48.0
Maximum | Access Equipment
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges				$ 53.0
Access Equipment Restructuring Plan 1 | Access Equipment
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges					$ 3.0
Restructuring charges	0.2	$ 0.7
Access Equipment Restructuring Plan 2 | Access Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.1
Restructuring and Related Cost, Expected Cost Remaining	$ 4.0