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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2012
Fair Value Measurements (Tables) [Abstract]  
Summary of financial instruments recognized at fair value and fair value measurement used
A summary of financial instruments recognized at fair value, and the fair value measurements used, follows:
 
Total
 
Quoted prices
in active
markets for
identical assets
(Level 1)
 
Other
observable
inputs
(Level 2)
 
Unobservable
inputs
(Level 3)
2012
 
 
 
 
 
 
 
Cash
$
577

 
$
577

 
$

 
$

Short-term investments
527

 
527

 

 

Net derivative contracts
83

 

 
83

 

Long-term debt converted to floating interest rates by
   interest rate swaps - net
87

 

 
87

 

 
 
 
 
 
 
 
 
2011
 
 
 
 
 
 
 
Cash
$
385

 
$
385

 
$

 
$

Short-term investments
699

 
699

 

 

Net derivative contracts
46

 

 
46

 

Long-term debt converted to floating interest rates by
   interest rate swaps - net
66

 

 
66

 

Summary of carrying value of short-term investments
A summary of the carrying value of short-term investments follows:
 
2012
 
2011
Time deposits, certificate of deposits and demand deposits with banks
$
293

 
$
466

Money market investments
228

 
228

Other
6

 
5

Total short-term investments
$
527

 
$
699