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FINANCIAL INSTRUMENTS FINANCIAL INSTRUMENTS (Tables)
 6 Months Ended
Jun. 30, 2017
Financial Instruments [Abstract]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
Fair Value of Financial Instruments
 
At June 30, 2017
 
At December 31, 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
$
(476
)
$
—

$
(125
)
$
(601
)
 
$
(476
)
$
—

$
(95
)
$
(571
)
(1)
Marketable securities are included in "Other investments" in the consolidated balance sheets.