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Leases - Right of Use Asset Balance for Leases Disaggregated by Segment and Type of Lease (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | $ 205.9 | $ 209.2
Finance leases, right of use asset balance | 58.4 | 28.0
Operating Segments | Access |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 90.3 | 80.8
Finance leases, right of use asset balance | 13.8 | 7.3
Operating Segments | Defense |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 40.3 | 46.8
Finance leases, right of use asset balance | 8.0 | 5.8
Operating Segments | Vocational |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 60.6 | 65.5
Finance leases, right of use asset balance | 2.9 | 1.4
Corporate and Intersegment Eliminations |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 14.7 | 16.1
Finance leases, right of use asset balance | 33.7 | 13.5
Real Estate Leases |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 191.5 | 195.4
Finance leases, right of use asset balance | 11.9 | 6.9
Real Estate Leases | Operating Segments | Access |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 83.9 | 77.2
Finance leases, right of use asset balance | 8.9 | 4.1
Real Estate Leases | Operating Segments | Defense |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 39.3 | 45.7
Finance leases, right of use asset balance | 2.4 | 2.8
Real Estate Leases | Operating Segments | Vocational |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 58.5 | 62.9
Finance leases, right of use asset balance | 0.6 |
Real Estate Leases | Corporate and Intersegment Eliminations |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 9.8 | 9.6
Equipment Leases |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 14.4 | 13.8
Finance leases, right of use asset balance | 46.5 | 21.1
Equipment Leases | Operating Segments | Access |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 6.4 | 3.6
Finance leases, right of use asset balance | 4.9 | 3.2
Equipment Leases | Operating Segments | Defense |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 1.0 | 1.1
Finance leases, right of use asset balance | 5.6 | 3.0
Equipment Leases | Operating Segments | Vocational |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 2.1 | 2.6
Finance leases, right of use asset balance | 2.3 | 1.4
Equipment Leases | Corporate and Intersegment Eliminations |  |
Lessee Lease Description [Line Items] |  |
Operating leases, right of use asset balance | 4.9 | 6.5
Finance leases, right of use asset balance | $ 33.7 | $ 13.5

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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-1 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + 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 -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-1 + Details
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