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Other Income, Net - Additional Information (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2014
USD ($)
VEF / $
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
VEF / $
Sep. 30, 2014
USD ($)
VEF / $
Feb. 28, 2013
VEF / $
Amount charged to expense due to inflationary accounting $ 3   $ 17    
Official Exchange [Member]          
Foreign Currency Exchange Rate, Remeasurement | VEF / $         6.3
Foreign Currency Transaction Gain (Loss), Realized $ 1 $ 7      
SICAD [Member]          
Foreign Currency Exchange Rate, Remeasurement | VEF / $ 12.0   10.7 12.0  
SICAD2 [Member]          
Foreign Currency Transaction Gain (Loss), Realized $ 8 $ 6      
Average Transacted Exchange Rate | VEF / $ 49.9        
Other Income, Net Error [Member]          
Quantifying Misstatement in Current Year Financial Statements, Amount       $ 6