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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)
 6 Months Ended
Jun. 30, 2017
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
Net Periodic Benefit Cost for All Significant Plans
Three Months Ended
 
Six Months Ended
In millions
Jun 30,
2017

 
Jun 30,
2016

 
Jun 30,
2017

 
Jun 30,
2016

Defined Benefit Pension Plans:
 
 
 
 
 
 
 
Service cost
$
126

 
$
111

 
$
251

 
$
215

Interest cost
220

 
207

 
439

 
404

Expected return on plan assets
(385
)
 
(356
)
 
(768
)
 
(698
)
Amortization of prior service credit
(6
)
 
(6
)
 
(12
)
 
(12
)
Amortization of net loss
158

 
148

 
315

 
294

Curtailment/settlement (1)
(6
)
 
—

 
(6
)
 
—

Net periodic benefit cost
$
107

 
$
104

 
$
219

 
$
203

 
 
 
 
 
 
 
 
Other Postretirement Benefits:
 
 
 
 
 
 
 
Service cost
$
3

 
$
3

 
$
6

 
$
6

Interest cost
13

 
12

 
27

 
24

Amortization of prior service credit
—

 
—

 
—

 
(1
)
Amortization of net gain
(1
)
 
(2
)
 
(3
)
 
(4
)
Net periodic benefit cost
$
15

 
$
13

 
$
30

 
$
25


(1)
The 2017 impact relates to the curtailment and settlement of a pension plan in Korea.