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Note 12: Guarantees (Tables)
9 Months Ended
Sep. 30, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]  
Product Warranty Disclosure [Text Block]
(Dollars in millions) 2012 2011
Balance as of January 1 $ 1,468 $ 1,136
Warranties and performance guarantees issued   235   370
Settlements made   (217)   (333)
Other   (165)   315
Balance as of September 30 $ 1,321 $ 1,488