PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
PROPERTY AND EQUIPMENT
Impairment expense	$ 4.0
Property and equipment, Gross	680.8		$ 761.4
Accumulated depreciation	(292.9)		(322.4)
Property and equipment, Net	387.9		439.0
Depreciation	24.5	$ 37.2
Revenue equipment
PROPERTY AND EQUIPMENT
Property and equipment, Gross	519.8		597.0
Buildings and improvements
PROPERTY AND EQUIPMENT
Property and equipment, Gross	57.9		59.9
Assets leased and available for lease to owner operators
PROPERTY AND EQUIPMENT
Property and equipment, Gross	71.3		64.3
Accumulated depreciation	(4.1)	(5.6)
Furniture and fixtures, office and computer equipment and vehicles
PROPERTY AND EQUIPMENT
Property and equipment, Gross	31.8		$ 40.2
Property and equipment
PROPERTY AND EQUIPMENT
Depreciation	$ 20.4	$ 24.7

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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