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Impairment, Restructuring Charges and Other Related Closure Costs - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Veredus [Member]
Sep. 30, 2012
Wireless ("WPS") [Member]
Dec. 31, 2012
Wireless ("WPS") [Member]
Dec. 31, 2012
Carrollton [Member]
Dec. 31, 2013
Digital Restructuring Plan [Member]
Dec. 31, 2012
Digital Restructuring Plan [Member]
Dec. 31, 2013
Other Restructuring Initiatives [Member]
Dec. 31, 2012
Other Restructuring Initiatives [Member]
Dec. 31, 2011
Other Restructuring Initiatives [Member]
Dec. 31, 2012
Other Restructuring Initiatives [Member]
Long Lived Assets [Member]
Dec. 31, 2013
Manufacturing Restructuring Plan [Member]
Dec. 31, 2012
Manufacturing Restructuring Plan [Member]
Dec. 31, 2011
Manufacturing Restructuring Plan [Member]
Sep. 30, 2013
Annual Impairment Test [Member]
Dec. 31, 2013
Annual Impairment Test [Member]
Dec. 31, 2012
Annual Impairment Test [Member]
Sep. 30, 2013
Annual Impairment Test [Member]
Digital Convergence Group ("DCG") [Member]
Goodwill [Member]
Sep. 30, 2013
Annual Impairment Test [Member]
Digital Convergence Group ("DCG") [Member]
Dedicated Intangible Assets [Member]
Dec. 31, 2013
Manufacturing Consolidation [Member]
Dec. 31, 2013
Manufacturing Consolidation [Member]
Employee Termination Benefits [Member]
Dec. 31, 2013
St-Ericsson Exit [Member]
Dec. 31, 2012
St-Ericsson Exit [Member]
Dec. 31, 2013
St-Ericsson Exit [Member]
Employee Termination Benefits [Member]
Dec. 31, 2013
St-Ericsson Exit [Member]
Employee Termination Benefits [Member]
SWEDEN [Member]
Dec. 31, 2012
Goodwill and Other Intangible Assets [Member]
Wireless ("WPS") [Member]
Dec. 31, 2012
Goodwill [Member]
Wireless ("WPS") [Member]
Dec. 31, 2012
Contractual Customer Relationships [Member]
Wireless ("WPS") [Member]
Dec. 31, 2012
Capitalized Software [Member]
Wireless ("WPS") [Member]
Dec. 31, 2012
Acquired technology [Member]
Wireless ("WPS") [Member]
Dec. 31, 2013
$600-650 Million Net Opex Plan [Member]
Dec. 10, 2012
$600-650 Million Net Opex Plan [Member]
Minimum [Member]
Dec. 10, 2012
$600-650 Million Net Opex Plan [Member]
Maximum [Member]
Dec. 31, 2013
$600-650 Million Net Opex Plan [Member]
Employee Termination Benefits [Member]
Dec. 31, 2013
St-Ericsson Restructuring Plan [Member]
Dec. 31, 2012
St-Ericsson Restructuring Plan [Member]
Dec. 31, 2011
St-Ericsson Restructuring Plan [Member]
Dec. 31, 2013
Other Restructuring Plans [Member]
Dec. 31, 2012
ST-Ericsson April 2012 Restructuring Plan [Member]
Dec. 31, 2012
ST-Ericsson Cost Savings Plan [Member]
Dec. 31, 2011
ST-Ericsson Cost Savings Plan [Member]
Dec. 31, 2011
ST-Ericsson Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]                                                                                          
Impairment charges $ 69 $ 109 $ 1,268 $ 4 $ 5 $ 690 $ 1,234 $ 21              $ 2   $ 21 $ 3 $ 56 $ 56 $ 694 $ 38 $ 18 $ 29   $ 17 $ 544     $ 544 $ 922 $ 261 $ 45 $ 6                $ 1          
Impairment charges on intangibles     4             7                                                                      
Net operating expenses                                                                     600 650                  
Annual saving under restructuring plan                   150                                                                      
Other restructuring costs   183 108 71           13   11 5       34           8 8     69             88     88 9     9 64 20 26 6
Adjustments for unused provisions                                                       31                                  
Termination benefits for employees   178 84 43             6    1        13             8   69                  88       6 1 3   60     3
Other related closure costs   5 24 28                8 4     2 21                                               3    3   4     3
Expected payment   65 75                                                                                    
Pre-tax charges incurred                 16           313                                                            
Expected to result in pre-tax charges, maximum                 30           300                                                            
Expected to result in pre-tax charges, minimum                 25           270                                                            
Restructuring charges and other related closure costs   $ 147