XML 94 R36.htm IDEA: XBRL DOCUMENT v2.4.1.9

Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Schedule of Property, Plant and Equipment Useful Lives

Land is not depreciated. Depreciation on fixed assets is computed using the straight-line method over their estimated useful lives, as follows:

Buildings			33 years
Facilities and leasehold improvements			5-10 years
Machinery and equipment			3-10 years
Computer and R&D equipment			3-6 years
Other			2-5 years

X

- Definition

Schedule Of Property Plant And Equipment Useful Lives Table [Text Block]

+ References

No definition available.

+ Details

Name:	stm_ScheduleOfPropertyPlantAndEquipmentUsefulLivesTableTextBlock
Namespace Prefix:	stm_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration