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FINANCIAL INSTRUMENTS FINANCIAL INSTRUMENTS (Tables)
 9 Months Ended
Sep. 30, 2017
Financial Instruments [Abstract]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
Fair Value of Financial Instruments
Sep 30, 2017
Dec 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
$
(475
)
$
—

$
(134
)
$
(609
)
$
(476
)
$
—

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