Impairment of Long-Lived Assets (Details) (USD $) In Millions	3 Months Ended			3 Months Ended		3 Months Ended
Sep. 26, 2009 End-of-Line Sorting and Testing Facilities [Member]	Dec. 27, 2008 End-of-Line Sorting and Testing Facilities [Member]	Jun. 26, 2010 End-of-Line Sorting and Testing Facilities [Member]	Jun. 27, 2009 End-of-Line Sorting and Testing Facilities [Member]	Sep. 26, 2009 Wafer Fabrication Facilit, Oregon [Member]	Jun. 26, 2010 Wafer Fabrication Facilit, Oregon [Member]	Sep. 27, 2008 Wafer Fabrication Facility, San Jose [Member]
Long Lived Assets Held-for-sale [Line Items]
Impairment of long-lived assets held for sale	$ 5.0	$ 43.8			$ 3.3		$ 7.3
Long-lived assets held for sale			$ 0.6	$ 3.6		$ 0.5

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 27, 28, 29, 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6390789&loc=d3e2611-110228

Name:	us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration