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LONG-TERM DEBT AND FINANCING ARRANGEMENTS - Notes Payable (Details) - Notes payable - USD ($) $ in Millions |  | 12 Months Ended
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Feb. 25, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenue equipment | Subsequent Event |  |  |
Financing Arrangements |  |  |
Assets financed during the period under promissory note arrangements | $ 6.2 |  |
Revenue equipment and software |  |  |
Financing Arrangements |  |  |
Assets financed during the period under promissory note arrangements |  | $ 59.7 | $ 61.8

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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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