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Leases (Assets Recorded Under Finance Leases) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Cost | $ 53.9 | $ 50.5
Accumulated depreciation | (28.8) | (26.4)
Net book value | 25.1 | 24.1
Auto equipment |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 27.6 | 22.1
Accumulated depreciation | (13.0) | (9.5)
Net book value | 14.6 | 12.6
Computer equipment |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 15.4 | 14.3
Accumulated depreciation | (8.4) | (8.0)
Net book value | 7.0 | 6.3
Yard and others |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 10.9 | 14.1
Accumulated depreciation | (7.4) | (8.9)
Net book value | $ 3.5 | $ 5.2

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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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Period Type: | instant

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- Definition Amount of accumulated amortization of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Amount, before accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -SubTopic 20 -Topic 842 -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 No definition available. + Details
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- Details
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- Details
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