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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
(Dollars in millions)
North
America
 
MENA/
Asia Pacific
 
Europe/
SSA/
Russia
 
Latin
America
 
Total
Balance at December 31, 2016
$
1,777

 
$
189

 
$
543

 
$
288

 
$
2,797

Reclassification to assets held for sale
(555
)
 
—

 
—

 
—

 
(555
)
Foreign currency translation adjustments
28

 
4

 
20

 
(1
)
 
51

Balance at June 30, 2017
$
1,250

 
$
193

 
$
563

 
$
287

 
$
2,293