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Fair Value Measurements (Tables)
 3 Months Ended
Mar. 31, 2014
Fair Value Disclosures [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)
March 31, 2014
 
 
 
 
 
 
 
Cash
$
784

 
$
784

 
$
—

 
$
—

Short-term investments
360

 
360

 
—

 
—

Net derivative contracts
1

 
—

 
1

 
—

Long-term debt converted to floating interest rates by
   interest rate swaps - net
(10
)
 
—

 
(10
)
 
—

 
 
 
 
 
 
 
 
December 31, 2013
 
 
 
 
 
 
 
Cash
$
915

 
$
915

 
$
—

 
$
—

Short-term investments
794

 
794

 
—

 
—

Net derivative contracts
(35
)
 
—

 
(35
)
 
—

Long-term debt converted to floating interest rates by
   interest rate swaps - net
(39
)
 
—

 
(39
)
 
—