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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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Millions	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
PROPERTY AND EQUIPMENT
Impairment expense		$ 4.0
Property and equipment, Gross	$ 700.5			$ 700.5		$ 761.4
Accumulated depreciation	311.9			311.9		322.4
Property and equipment, Net	388.6			388.6		439.0
Depreciation	21.0		$ 35.8	45.5	$ 73.0
Revenue equipment
PROPERTY AND EQUIPMENT
Property and equipment, Gross	533.8			533.8		597.0
Buildings and improvements
PROPERTY AND EQUIPMENT
Property and equipment, Gross	58.2			58.2		59.9
Assets leased and available for lease to owner operators
PROPERTY AND EQUIPMENT
Property and equipment, Gross	73.7			73.7		64.3
Accumulated depreciation	8.3		10.7	8.3	10.7
Depreciation	4.2		5.1
Furniture and fixtures, office and computer equipment and vehicles
PROPERTY AND EQUIPMENT
Property and equipment, Gross	34.8			34.8		$ 40.2
Property and equipment
PROPERTY AND EQUIPMENT
Depreciation	$ 16.8		$ 30.8	$ 37.2	$ 62.3