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Fair Value Measurements
12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Fair Value Measurements
FAIR VALUE MEASUREMENTS
Assets and liabilities measured at fair value on a recurring basis at December 31, 2015 and 2014 are as follows:
 
 
Total Cost Basis
 
Quoted Prices In
Active Markets for
Identical Assets
(Level 1)
 
Significant Other
Observable Inputs
(Level 2)
 
Total Fair Value
Millions of dollars
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Money market funds (1)
 
$
13

 
$
21

 
$
13

 
$
21

 
$

 
$

 
$
13

 
$
21

Net derivative contracts
 

 

 

 

 
(42
)
 
(1
)
 
(42
)
 
(1
)
Available for sale investments
 
11

 
16

 
25

 
26

 

 

 
25

 
26

(1) Money market funds are comprised primarily of government obligations and other first tier obligations.
In 2014, we sold shares held in Alno AG, a long-standing European customer, resulting in the conversion of our investment from the equity method of accounting to an available for sale investment due to our less than 20% overall investment in Alno AG. The company also has an available for sale investment in Elica S.p.A., a long standing supplier.