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Pension Plans Pension (Tables) (Pension Plan [Member])
3 Months Ended
Mar. 31, 2015
Pension Plan [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Net Benefit Costs [Table Text Block]
 
Three Months Ended March 31,
Dollars in millions
2015
 
2014
 
United States
 
Int’l
 
United States
 
Int’l
Components of net periodic benefit cost
 
 
 
 
 
 
 
Service cost
$

 
$

 
$

 
$
1

Interest cost
1

 
19

 
1

 
22

Expected return on plan assets
(1
)
 
(24
)
 
(1
)
 
(26
)
Recognized actuarial loss
1

 
11

 
1

 
10

Net periodic benefit cost
$
1

 
$
6

 
$
1

 
$
7