Commitments And Contingencies (Details) (USD $)	12 Months Ended				0 Months Ended					0 Months Ended	12 Months Ended
	Dec. 25, 2011	Dec. 25, 2011 POWI 1 [Member]	Dec. 25, 2011 POWI 2 [Member]	Dec. 25, 2011 POWI 3 [Member]	Dec. 25, 2011 POWI 4 [Member]	Feb. 10, 2010 POWI 4 [Member]	Dec. 25, 2011 Possible Loss [Member]	Dec. 25, 2011 Probable Loss [Member]	Dec. 25, 2011 Maximum [Member]	Oct. 31, 2006 Maximum [Member] POWI 1 [Member]	Dec. 27, 2008 Minimum [Member] POWI 1 [Member]
Loss Contingencies [Line Items]
Future minimum payments	$ 17,300,000
Indemnification for remediation costs and other liabilities related to historical contamination									150,000,000
Number of outstanding proceedings with power integrations	4
Number of patents in lawsuit		4	3	3
Number of phases in trial		3
Number of products in violation	33
Number of claims in lawsuit		7	1
Damages awarded for infringement of the patents		12,200,000								34,000,000	6,100,000
Number of company subsidiaries included in complaint				2	4
Number of patents dropped from case				1
Number of vendors included in lawsuit					7
Assessed damages for infringement of Fairchild patents						17,000,000
Range of possible losses, minimum							0
Range of possible losses, maximum							5,000,000
Potential litigation outcomes								$ 13,100,000