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Impairment, Restructuring Charges and Other Related Closure Costs - Summary of Impairment Restructuring Charges and Other Related Closure Costs (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]      
Impairment $ (1,268) $ (4) $ (11)
Restructuring charges (84) (43) (75)
Other related closure costs (24) (28) (18)
Total impairment, restructuring charges and other related closure costs (1,376) (75) (104)
Manufacturing Restructuring Plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment (21) (3) (1)
Restructuring charges    (13) (15)
Other related closure costs (2) (21) (11)
Total impairment, restructuring charges and other related closure costs (23) (37) (27)
St-Ericsson restructuring plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment    (1) (10)
Restructuring charges (1) (3) (59)
Other related closure costs    (3) (5)
Total impairment, restructuring charges and other related closure costs (1) (7) (74)
St-Ericsson cost savings plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment        
Restructuring charges (10) (26)  
Other related closure costs (10)     
Total impairment, restructuring charges and other related closure costs (20) (26)  
St-Ericsson April 2012 restructuring plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment (2)    
Restructuring charges (60)    
Other related closure costs (4)    
Total impairment, restructuring charges and other related closure costs (66)    
St-Ericsson exit [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment (544)    
Restructuring charges       
Total impairment, restructuring charges and other related closure costs (544)    
Digital restructuring plan [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment (7)    
Restructuring charges (13)    
Other related closure costs       
Total impairment, restructuring charges and other related closure costs (20)    
Annual Impairment Test [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment (694)    
Restructuring charges       
Other related closure costs       
Total impairment, restructuring charges and other related closure costs (694)    
Other Restructuring Initiatives [Member]
      
Restructuring Cost and Reserve [Line Items]      
Impairment         
Restructuring charges    (1) (1)
Other related closure costs (8) (4) (2)
Total impairment, restructuring charges and other related closure costs $ (8) $ (5) $ (3)