FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

Fair Value of Financial Instruments	2017											2016
In millions	Cost			Gain		Loss			Fair Value			Cost			Gain		Loss			Fair Value
Cash equivalents	$	9		$	—	$	—		$	9		$	7		$	—	$	—		$	7
Debt securities 1	$	—		$	—	$	—		$	—		$	2		$	—	$	—		$	2
Long-term debt including debt due within one year	$	(475	)	$	—	$	(129	)	$	(604	)	$	(476	)	$	—	$	(95	)	$	(571	)

1. Marketable securities are included in “Other investments” in the consolidated balance sheets.