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Leases - Right of Use Asset Balance for Operating Leases Disaggregated by Segment and Type of Lease (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Lessee Lease Description [Line Items] |  |
Right of use asset balance | $ 194.7 | $ 149.0
Operating Segments | Access Equipment |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 89.8 | 68.7
Operating Segments | Defense |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 57.6 | 32.4
Operating Segments | Fire & Emergency |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 7.9 | 8.7
Operating Segments | Commercial |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 18.4 | 19.8
Corporate and Intersegment Eliminations |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 21.0 | 19.4
Real Estate Leases |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 174.2 | 121.0
Real Estate Leases | Operating Segments | Access Equipment |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 84.3 | 61.4
Real Estate Leases | Operating Segments | Defense |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 55.6 | 28.2
Real Estate Leases | Operating Segments | Fire & Emergency |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 6.2 | 6.5
Real Estate Leases | Operating Segments | Commercial |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 15.9 | 17.9
Real Estate Leases | Corporate and Intersegment Eliminations |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 12.2 | 7.0
Equipment Leases |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 20.5 | 28.0
Equipment Leases | Operating Segments | Access Equipment |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 5.5 | 7.3
Equipment Leases | Operating Segments | Defense |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 2.0 | 4.2
Equipment Leases | Operating Segments | Fire & Emergency |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 1.7 | 2.2
Equipment Leases | Operating Segments | Commercial |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | 2.5 | 1.9
Equipment Leases | Corporate and Intersegment Eliminations |  |
Lessee Lease Description [Line Items] |  |
Right of use asset balance | $ 8.8 | $ 12.4

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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