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Segment Information - Operating Income loss by Product Segment (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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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 |
Automotive ("APG") [Member] |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total consolidated operating income (loss) | 129 |  | 227 |  | 121 |
Digital [Member] |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total consolidated operating income (loss) | (154) |  | 108 |  | 245 |
Analog MEMS And Microcontrollers ("AMM") [Member] |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total consolidated operating income (loss) | 418 |  | 606 |  | 546 |
Power Discrete Products ("PDP") [Member] |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total consolidated operating income (loss) | 18 |  | 139 |  | 179 |
Wireless [Member] |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |
Total consolidated operating income (loss) | (885) |  | (812) |  | (483) |
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 |
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) | [1] | $ (222) | [1] | $ (132) | [1]
[1] | 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.

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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
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- Details
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