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Segment Reporting - Depreciation and Amortization Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information |  |  |  |
Depreciation and amortization | $ 101.9 | $ 96.8 | $ 307.2 | $ 281.8
Truckload |  |  |  |
Segment Reporting Information |  |  |  |
Depreciation and amortization | 74.3 | 70.2 | 224.6 | 205.4
Intermodal |  |  |  |
Segment Reporting Information |  |  |  |
Depreciation and amortization | 13.3 | 13.3 | 40.2 | 39.8
Logistics |  |  |  |
Segment Reporting Information |  |  |  |
Depreciation and amortization | 0.0 | 0.0 | 0.0 | 0.1
Other |  |  |  |
Segment Reporting Information |  |  |  |
Depreciation and amortization | $ 14.3 | $ 13.3 | $ 42.4 | $ 36.5

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + 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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