PROPERTY AND EQUIPMENT, NET - Carrying Value of Property and Equipment and Estimated Service Lives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property and Equipment [Line Items]
Property and equipment, at cost	$ 5,649	$ 5,445
Accumulated depreciation and amortization	(3,592)	(3,432)
Property and equipment, net	2,057	2,013
Land
Property and Equipment [Line Items]
Property and equipment, at cost	83	84
Buildings and improvements
Property and Equipment [Line Items]
Property and equipment, at cost	$ 1,104	1,049
Buildings and improvements | Minimum
Property and Equipment [Line Items]
Estimated service lives	15 years
Buildings and improvements | Maximum
Property and Equipment [Line Items]
Estimated service lives	40 years
Machinery and Equipment
Property and Equipment [Line Items]
Property and equipment, at cost	$ 3,640	3,486
Machinery and Equipment | Minimum
Property and Equipment [Line Items]
Estimated service lives	5 years
Machinery and Equipment | Maximum
Property and Equipment [Line Items]
Estimated service lives	25 years
Roads
Property and Equipment [Line Items]
Property and equipment, at cost	$ 724	725
Roads | Minimum
Property and Equipment [Line Items]
Estimated service lives	10 years
Roads | Maximum
Property and Equipment [Line Items]
Estimated service lives	35 years
Other
Property and Equipment [Line Items]
Property and equipment, at cost	$ 98	$ 101
Other | Minimum
Property and Equipment [Line Items]
Estimated service lives	3 years
Other | Maximum
Property and Equipment [Line Items]
Estimated service lives	10 years