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PENSION AND POSTRETIREMENT BENEFIT PLANS (Tables)
 3 Months Ended
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]
The net periodic benefit cost/(credit) of defined benefit pension plans includes:
 
Three Months Ended March 31,
Dollars in Millions
2017
 
2016
Service cost – benefits earned during the year
$
6

 
$
6

Interest cost on projected benefit obligation
48

 
51

Expected return on plan assets
(103
)
 
(104
)
Amortization of prior service credits
(1
)
 
(1
)
Amortization of net actuarial loss
21

 
19

Curtailments and settlements
33

 
22

Special termination benefits
—

 
1

Net periodic benefit cost/(credit)
$
4

 
$
(6
)