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Description of Business and Significant Accounting Policies - Evaluation of Subsequent Events (Details) (USD $)
In Millions, unless otherwise specified
Jun. 22, 2012
Dec. 31, 2011
Sale [Member]
   
Subsequent Event [Line Items]    
Business Disposition, Price of Disposed Entity $ 100  
Entertainment Business [Member]
   
Subsequent Event [Line Items]    
Assets Held-for-sale, Current   72
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net   64
Disposal Group, Including Discontinued Operation, Inventory   6
Disposal Group, Including Discontinued Operation, Intangible Assets, Net   2
Entertainment Business [Member] | Sale [Member]
   
Subsequent Event [Line Items]    
Business Disposal, Software and Services Margin Threshold Triggering Additional Payment   25
Assets Held-for-sale, Current 67  
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net 51  
Disposal Group, Including Discontinued Operation, Inventory 15  
Disposal Group, Including Discontinued Operation, Intangible Assets, Net $ 1