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Segment Information - Reconciliation to Consolidated Operating Income loss (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) $ (2,081) $ 46 $ 476
Reportable Segment [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) (474) 268 608
Strategic R&D, other R&D programs and R&D funding [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) (12) (13) (18)
Phase Out And Start Up Costs [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss)   (8) (15)
Impairment And Restructuring Charges [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) (1,376) (75) (104)
Unused Capacity Charges [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) (172) (149) (3)
Nxp Arbitration Award [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) (54)    
Other Non-Allocated Provisions [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) 7 [1] 23 [1] 8 [1]
All Other Segments [Member]
      
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]      
Total consolidated operating income (loss) $ (1,607) [2] $ (222) [2] $ (132) [2]
[1] Includes unallocated income and expenses such as certain corporate-level operating expenses and other costs/income that are not allocated to the product segments.
[2] Operating loss of "Others" includes items such as impairment, restructuring charges and other related closure costs including ST-Ericsson plans, unused capacity charges, phase-out and start-up costs, the NXP arbitration award charge and other unallocated expenses such as: strategic or special research and development programs, certain corporate-level operating expenses and other costs that are not allocated to the product segments, as well as operating earnings of the Subsystems and Other Products Group.