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Impairment, Restructuring Charges and Other Related Closure Costs - Changes to Restructuring Provisions Recorded on Consolidated Balance Sheets (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]      
Charges incurred $ 183 $ 108 $ 71
Amounts paid (147)    
St-Ericsson Restructuring Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Charges incurred 9    
$600-650 Million Net Opex Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Charges incurred 88    
Manufacturing Restructuring Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Charges incurred     34
Manufacturing Consolidation [Member]
      
Restructuring Cost and Reserve [Line Items]      
Charges incurred 8    
Other Restructuring Initiatives [Member]
      
Restructuring Cost and Reserve [Line Items]      
Charges incurred   11 5
Changes to Restructuring Provisions [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance 91 53  
Charges incurred 217 122  
Adjustments for unused provisions (34) (14)  
Amounts paid (147) (73)  
Currency translation effect 1     
ST-Ericsson break-up and deconsolidation (52)    
Provision, ending balance 76 91  
Changes to Restructuring Provisions [Member] | St-Ericsson Exit [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance 8     
Charges incurred 100 8  
Adjustments for unused provisions (31)     
Amounts paid (30)     
Currency translation effect (1)     
ST-Ericsson break-up and deconsolidation (46)    
Provision, ending balance    8  
Changes to Restructuring Provisions [Member] | St-Ericsson Restructuring Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance 59 36  
Charges incurred 12 96  
Adjustments for unused provisions (3) (11)  
Amounts paid (56) (65)  
Currency translation effect    3  
ST-Ericsson break-up and deconsolidation (12)    
Provision, ending balance    59  
Changes to Restructuring Provisions [Member] | $600-650 Million Net Opex Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance        
Charges incurred 88     
Adjustments for unused provisions        
Amounts paid (44)     
Currency translation effect 2     
ST-Ericsson break-up and deconsolidation       
Provision, ending balance 46     
Changes to Restructuring Provisions [Member] | Digital Restructuring Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance 12     
Charges incurred 3 13  
Adjustments for unused provisions        
Amounts paid (9) (1)  
Currency translation effect        
ST-Ericsson break-up and deconsolidation       
Provision, ending balance 6 12  
Changes to Restructuring Provisions [Member] | Manufacturing Restructuring Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance 3 4  
Charges incurred    2  
Adjustments for unused provisions        
Amounts paid (1) (3)  
Currency translation effect        
ST-Ericsson break-up and deconsolidation       
Provision, ending balance 2 3  
Changes to Restructuring Provisions [Member] | Manufacturing Consolidation [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance        
Charges incurred 8     
Adjustments for unused provisions        
Amounts paid        
Currency translation effect        
ST-Ericsson break-up and deconsolidation       
Provision, ending balance 8     
Changes to Restructuring Provisions [Member] | Other Restructuring Initiatives [Member]
      
Restructuring Cost and Reserve [Line Items]      
Provision, beginning balance 9 13  
Charges incurred 6 3  
Adjustments for unused provisions    (3)  
Amounts paid (7) (4)  
Currency translation effect    (3)  
ST-Ericsson break-up and deconsolidation 6    
Provision, ending balance $ 14 $ 9