PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Property and equipment
Finance lease assets	$ 61	$ 59
Property, equipment and finance lease assets, gross	1,721	1,688
Less: accumulated depreciation	(888)	(865)
Total property and equipment, net	833	823
Land and improvements
Property and equipment
Property and equipment, gross	72	74
Real estate held for development and sale
Property and equipment
Property and equipment, gross	21	25
Buildings and improvements
Property and equipment
Property and equipment, gross	$ 308	307
Buildings and improvements \| Minimum
Property and equipment
Estimated useful lives	10 years
Buildings and improvements \| Maximum
Property and equipment
Estimated useful lives	30 years
Operating equipment
Property and equipment
Property and equipment, gross	$ 973	939
Operating equipment \| Minimum
Property and equipment
Estimated useful lives	5 years
Operating equipment \| Maximum
Property and equipment
Estimated useful lives	10 years
Office furniture and equipment
Property and equipment
Property and equipment, gross	$ 129	123
Office furniture and equipment \| Minimum
Property and equipment
Estimated useful lives	5 years
Office furniture and equipment \| Maximum
Property and equipment
Estimated useful lives	10 years
Leasehold improvements
Property and equipment
Property and equipment, gross	$ 60	59
Leasehold improvements \| Minimum
Property and equipment
Estimated useful lives	10 years
Leasehold improvements \| Maximum
Property and equipment
Estimated useful lives	30 years
Automotive equipment
Property and equipment
Property and equipment, gross	$ 63	66
Automotive equipment \| Minimum
Property and equipment
Estimated useful lives	3 years
Automotive equipment \| Maximum
Property and equipment
Estimated useful lives	5 years
Construction in progress
Property and equipment
Property and equipment, gross	$ 34	$ 36

Amount, before accumulated amortization, of right-of-use asset from finance lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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