v2.4.0.8
Commitments and Contingencies - Additional Information (Detail) (USD $)
3 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2013
Dec. 31, 2012
Loss Contingencies [Line Items]      
Approximate number of federal district court actions alleged for patent infringement   50  
Payments for Legal Settlements $ 400,000,000   $ 384,000,000
Litigation settlements, payment period   6 years  
Future payments for Legal Settlements 200,000,000    
Guarantee obligations, year term (in years)   30  
Letters of credit   100,000,000  
Purchase commitments   33,400,000,000  
2014   19,700,000,000  
2015-2016   8,800,000,000  
2017-2018   4,100,000,000  
Thereafter   800,000,000  
Purchases against commitments   $ 16,000,000,000