PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of estimated useful lives

Depreciation is generally computed under the straight-line method over the following estimated useful lives:

Buildings and improvements	10 - 30 years
Operating equipment	5 - 10 years
Office furniture and equipment	5 - 10 years
Leasehold improvements	Lesser of 10 - 30 years or lease term
Automotive equipment	3 - 5 years
Property and equipment under finance leases	Lease term

Schedule of property and equipment stated at cost less accumulated depreciation

Property and equipment consisted of the following as of December 31, 2020 and 2019 (in millions):

	2020		2019
Land and improvements	$	74	$	75
Real estate held for development and sale	25		26
Buildings and improvements	307		293
Operating equipment	939		781
Office furniture and equipment	123		114
Leasehold improvements	59		36
Automotive equipment	66		64
Finance lease assets	59		53
Construction in progress	36		116
	1,688		1,558
Less: accumulated depreciation	(865)		(793)
	$	823	$	765