ACQUISITIONS (Detail) (USD $)	12 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011
Business Acquisition [Line Items]
Payments for acquisitions, net of cash acquired	$ 0	$ (585,218,000)	$ (436,849,000)
Acquisition related costs		7,300,000	6,300,000
Credit facility issuance costs	623,000	41,790,000	17,218,000
Increase in valuation allowance	(13,900,000)	194,700,000
Business Acquisition, Pro Forma Information [Abstract]
Net sales		1,019,329,000	1,095,481,000
Net income		10,002,000	65,804,000
Basic		$ 0.12	$ 0.78
Diluted		$ 0.11	$ 0.77
Zarlink Semiconductor Inc
Business Acquisition [Line Items]
Credit facility issuance costs		34,000,000
Actel Corporation
Business Acquisition [Line Items]
Credit facility issuance costs		14,200,000
Fair Value Adjustment to Inventory
Business Acquisition [Line Items]
Cost of goods sold		9,200,000	5,500,000
Valuation Allowance of Deferred Tax Assets
Business Acquisition [Line Items]
Increase in valuation allowance			$ 5,000,000