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Discontinued Operations (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Subsidiaries    
Loss from discontinued operations $ 1 $ 10
Special termination benefits   8
Discontinued Operations, Disposed Venezuelan Subsidiaries
   
Subsidiaries    
Ongoing costs related to the expropriation $ 1 $ 2