PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Line Items]

Carrying Value of Property and Equipment and Estimated Service Lives

Carrying Value of Property and Equipment and Estimated Service Lives

DOLLAR AMOUNTS IN MILLIONS
	RANGE OF LIVES	DECEMBER 31, 2017			DECEMBER 31, 2016
Property and equipment, at cost:
Land	N/A	$	88		$	90
Buildings and improvements	15-35	867			789
Machinery and equipment	5-25	3,037			3,022
Roads	10-35	782			773
Other	3-10	182			194
Total cost		4,956			4,868
Accumulated depreciation and amortization		(3,338		)	(3,306		)
Property and equipment, net		$	1,618		$	1,562