(GAIN) LOSS ON SALE OF ASSETS AND ASSET IMPAIRMENT CHARGES (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended	3 Months Ended
Dec. 31, 2011	Sep. 30, 2010 INSIDE	Jun. 30, 2010 INSIDE
Variable interest entity
Period of commitments to purchase wafers from LFoundry (in years)	4 years		3 years
Cost of investment		$ 3.9
Percentage of ownership interest		3.00%

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 5A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6970148&loc=SL6759159-111685

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration