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Guarantees (Tables)
6 Months Ended
Jun. 30, 2012
Guarantees [Abstract]  
Guarantees
(Millions of dollars)
 
June 30,
2012
 
December 31,
2011
Customer guarantees
$
158

 
$
159

Limited indemnity
8

 
11

Total guarantees
$
166

 
$
170