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Note 12: Guarantees (Tables)
 3 Months Ended
Mar. 31, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]  
Product Warranty Disclosure [Text Block]
 
 
Quarter Ended March 31,
(Dollars in millions)
 
2013
 
2012
Balance as of January 1
 
$
1,332

 
$
1,468

Warranties and performance guarantees issued
 
94

 
77

Settlements made
 
(76
)
 
(82
)
Other
 
(14
)
 
(328
)
Balance as of March 31
 
$
1,336

 
$
1,135