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INCOME TAXES (Tables)
 9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]  
Schedule of Unrecognized Tax Benefits Rollforward [Table Text Block]
The following table presents a rollforward of unrecognized tax benefits and related accrued estimated interest and penalties for the nine months ended September 30, 2017: 
In millions
Unrecognized
Tax Benefits
 
Accrued Estimated
Interest and Tax
Penalties
Balance at December 31, 2016
$
(98
)
 
$
(22
)
Activity for three months ended March 31, 2017
(2
)
 
2

Activity for the three months ended June 30, 2017
(42
)
 
1

Activity for the three months ended September 30, 2017
1

 
—

Balance at September 30, 2017
$
(141
)
 
$
(19
)