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Impairment, Restructuring Charges and Other Related Closure Costs (Details 1) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2011
ST-Ericsson Cost Savings Plan [Member]
Dec. 31, 2011
ST-Ericsson Cost Savings Plan [Member]
Dec. 31, 2009
ST-Ericsson Cost Savings Plan [Member]
Dec. 31, 2011
ST-Ericsson Restructuring Plan [Member]
Dec. 31, 2010
ST-Ericsson Restructuring Plan [Member]
Dec. 31, 2011
ST-Ericsson Restructuring Plan [Member]
Dec. 31, 2011
Manufacturing Restructuring Plan [Member]
Dec. 31, 2010
Manufacturing Restructuring Plan [Member]
Dec. 31, 2011
Manufacturing Restructuring Plan [Member]
Dec. 31, 2011
Other Restructuring Initiatives [Member]
Dec. 31, 2010
Other Restructuring Initiatives [Member]
Dec. 31, 2011
Other Restructuring Initiatives [Member]
Changes to the restructuring provisions recorded on the consolidated balance sheet                              
Provision for beginning balance at December 31 $ 136 $ 194 $ 53 $ 0 $ 19 $ 0 $ 60 $ 83 $ 17 $ 57 $ 58 $ 4 $ 19 $ 53 $ 13
Charges incurred 75 100   26     7 67   35 26   7 7  
Adjustments for unused provisions (4) (7)         (1) (3)   (1)     (2) (4)  
Amounts paid (154) (142)   (6)     (50) (81)   (87) (27)   (11) (34)  
Currency translation effect   $ (9)   $ (1)     $ 1 $ (6)           $ (3)