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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The changes in the carrying amount of goodwill by reportable segment for the two years ended December 31, 2016 and 2015, were as follows:
(Dollars in millions)
North
America
 
MENA/
Asia Pacific
 
Europe/
SSA/
Russia
 
Latin
America
 
Total
Balance at December 31, 2014
$
1,896

 
$
195

 
$
623

 
$
297

 
$
3,011

Acquisitions
3

 
—

 
—

 
—

 
3

Purchase price and other adjustments
—

 
1

 
—

 
—

 
1

Foreign currency translation
(143
)
 
(6
)
 
(50
)
 
(13
)
 
(212
)
Balance at December 31, 2015
$
1,756

 
$
190

 
$
573

 
$
284

 
$
2,803

Foreign currency translation
21

 
(1
)
 
(30
)
 
4

 
(6
)
Balance at December 31, 2016
$
1,777

 
$
189

 
$
543

 
$
288

 
$
2,797