Contingencies - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended	1 Months Ended			3 Months Ended		3 Months Ended			3 Months Ended			3 Months Ended
	Mar. 30, 2014 LegalMatter	Mar. 31, 2013	Dec. 29, 2013	Jan. 31, 2011 POWI 1	Dec. 31, 2008 POWI 1	Oct. 31, 2006 POWI 1	Mar. 30, 2014 POWI 1 Product Claim Phase Patent	Oct. 20, 2004 POWI 1 Patent	Mar. 30, 2014 POWI 2 Claim Patent	Apr. 27, 2012 POWI 2 System General Patent	Apr. 27, 2012 POWI 2 Power Integrations Patent	Mar. 30, 2014 POWI 4 Subsidiary Vendor	May 01, 2012 Powi5 Patent	May 01, 2012 Powi5 Power Integrations Patent	Mar. 30, 2014 POWI 3 Subsidiary Patent	Mar. 30, 2014 Minimum POWI 1	Mar. 30, 2014 Maximum POWI 1
Loss Contingencies [Line Items]
Number of outstanding proceedings with power integrations	5
Number of patents in lawsuit							4	4	3	2	4		3	5	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			$ 30,000,000	$ 12,200,000	$ 6,100,000	$ 34,000,000									$ 105,000,000	$ 500,000	$ 750,000
Release of litigation charge	4,400,000	(12,600,000)					12,600,000
Number of patents infringed										1	2				2
Number of company entities included in complaint												4			2
Possible losses, minimum	0														4,400,000
Possible losses, maximum	11,000,000														21,800,000
Loss contingency accrual															4,400,000
Number of vendors included in lawsuit												7
Assessed damages for infringement of Fairchild patents												17,000,000
Product sales value			$ 20,000