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Guarantees (Tables)
 9 Months Ended
Sep. 30, 2014
Notes to Condensed Consolidated Financial Statements [Abstract]  
Product Warranty Disclosure [Text Block]
(Dollars in millions)
 
2014
 
2013
Balance as of January 1
 
$
1,360

 
$
1,332

Warranties and performance guarantees issued
 
197

 
232

Settlements made
 
(256
)
 
(223
)
Other
 
(34
)
 
22

Balance as of September 30
 
$
1,267

 
$
1,363