XML 151 R135.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Segment Information - Net Revenues by Product Segment and by Product Line (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |
Net revenues | $ 6,973 | $ 6,897 | $ 7,404
Automotive and Discrete Group (ADG) [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | 2,813 | 2,731 | 2,897
Analog and MEMS Group (AMG) [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | 1,584 | 1,671 | 1,877
Microcontrollers and Digital ICs Group (MDG) [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | 2,285 | 2,292 | 2,377
Others [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | $ 291 | $ 203 | $ 253

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stm_AutomotiveAndDiscreteGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stm_AnalogAndMEMSGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stm_MicrocontrollersAndDigitalIcsGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |