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Income Tax - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Loss Carryforwards [Line Items]      
Netherlands statutory income taxes rate 25.00% 25.00% 25.50%
Significant losses in countries subject to tax holidays $ 320 $ 131 $ 91
Effect of the tax benefits on basic earnings per share $ 0.04 $ 0.13 $ 0.09
Maximum Percentage of Tax reduction from Tax holidays 100.00%    
Legal inflationary index 0.76%    
Deferred tax benefit (expense) 0 19  
Unrecognized tax benefits 26    
Foreign Subsidiaries And Corporate Joint Ventures [Member]
      
Operating Loss Carryforwards [Line Items]      
Cumulative amount of distributable earnings 1,306    
St Ericsson's [Member]
      
Operating Loss Carryforwards [Line Items]      
Deferred tax assets on tax loss carryforwards $ 191