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RELATED PARTY TRANSACTIONS (Tables) | 12 Months Ended
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Dec. 31, 2012
Transactions with Significant Shareholders, their Affiliates and Other Related Parties | Transactions with significant shareholders, their affiliates and other related parties were as follows:
|  | December 31, 2012 |  |  | December 31, 2011 |  |  | December 31, 2010 |
Sales & other services |  |  | 226 |  |  |  | 269 |  |  |  | 322 |
Research and development expenses |  |  | (282 | ) |  |  | (235 | ) |  |  | (206 | )
Other purchases |  |  | (53 | ) |  |  | (60 | ) |  |  | (94 | )
Accounts receivable |  |  | 53 |  |  |  | 54 |  |  |  | 53 |
Accounts payable |  |  | 62 |  |  |  | 42 |  |  |  | 63 |

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- Definition Transactions with significant shareholders, their affiliates and other related parties. + References No definition available. + Details
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Namespace Prefix: | stm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration