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Business Combinations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 1 Months Ended |  | 1 Months Ended | 12 Months Ended |  |
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Apr. 15, 2011 | Dec. 31, 2012 | Apr. 30, 2011 Veredus [Member] | Dec. 31, 2011 Veredus [Member] | Apr. 15, 2011 Veredus [Member] | Dec. 31, 2012 bTendo [Member]
Business Acquisition [Line Items] |  |  |  |  |  |
Equity investments, Ownership percentage |  |  |  |  | 41.20% |
Increase in ownership percentage after all transactions | 63.70% |  |  | 67.00% |  |
Allocation of goodwill of company's Analog, MEMS and Microcontrollers ("AMM") segment |  |  |  |  | $ 10 |
Cash amount of increased ownership |  |  | 1 |  |  |
Purchase consideration paid in cash |  |  |  | 7 |  | 1
Non-cash consideration paid |  |  |  |  |  | 1
Acquisition-date fair value |  | $ 9 |  |  |  |

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