FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2016

Financial Instruments [Abstract]

Fair Value of Financial Instruments

Fair Value of Financial Instruments
	At December 31, 2016											At December 31, 2015
In millions	Cost			Gain		Loss			Fair Value			Cost			Gain		Loss			Fair Value
Cash equivalents	$	7		$	—	$	—		$	7		$	5		$	—	$	—		$	5
Debt securities (1)	$	2		$	—	$	—		$	2		$	4		$	—	$	—		$	4
Long-term debt including debt due within one year	$	(476	)	$	—	$	(95	)	$	(571	)	$	(477	)	$	—	$	(96	)	$	(573	)

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